Seasonal Variation in Food Preference

Total Page：16

File Type：pdf, Size：1020Kb

West Africa Journal of Applied Ecology (WAJAE) –ISSN: 0855-4307 Volume 9 (Jan – Jun 2006) www.wajae.org Paper 14 of 18 Seasonal Variation in Food Preference and Feeding Ecology of Two Juvenile Marine Fishes, Pseudotolithus senegalensis (Sciaenidae) and Brachydeuterus auritus (Haemulidae) off Cape Coast, Ghana J. Blay, Jr.1*, W. K. Awittor1 and D. Agbeko2 1 Department of Fisheries and Aquatic Sciences, University of Cape Coast, Cape Coast, Ghana 2 Department of Animal Science, University of Cape Coast, Cape Coast, Ghana *Corresponding author Abstract Aspects of the feeding habits and diet of juveniles of the cassava croaker Pseudotolithus senegalensis (Valenciennes, 1833) (Sciaenidae) and bigeye grunt Brachydeuterus auritus (Valenciennes, 1831) (Haemulidae) in the inshore waters of Cape Coast, Ghana are reported in the study. Both species had a similar diet consisting of larvae of fish, shrimps and cuttlefish. The croaker ingested prey up to 77% of its total length while the bigeye grunt consumed prey up to 70% of its total length. Analysis of the stomach contents, based on the frequency of occurrence, and numerical and gravimetric compositions of these food items indicated that shrimps were the main food of P. senegalensis while B. auritus fed mainly on fish. While shrimps constituted the predominant food of the croakers all-year-round, the bigeye grunts appeared to shift their preference for fish to shrimps from June to September. The results of the study are compared with those on croakers from other parts of the Gulf of Guinea. The study, however, appears to be the first to give a detailed account of the food preference and feeding ecology of the bigeye grunt. Volume 9 (Jan – Jun 2006) Page 1 of 1 .

Copy Link

Recommended publications

University of Cape Coast Stock Assessment And
© University of Cape Coast https://erl.ucc.edu.gh/jspui UNIVERSITY OF CAPE COAST STOCK ASSESSMENT AND ASPECTS OF REPRODUCTION OF TRICHIURUS LEPTURUS AND LUTJANUS FULGENS IN GHANAIAN WATERS BY EUGENIA AMADOR Thesis submitted to the Department of Fisheries and Aquatic Sciences of the School of Biological Sciences, College of Agricultural and Natural Sciences, University of Cape Coast, in partial fulfillment of the requirements for the award of Master of Philosophy degree in Fisheries Science JULY, 2020 i Digitized by Sam Jonah Library © University of Cape Coast https://erl.ucc.edu.gh/jspui DECLARATION Candidate’s Declaration I hereby declare that this thesis is the result of my own original research and that no part of it has been presented for another degree in this university or elsewhere. Candidate’s Signature……………………………… Date …………………… Name: Eugenia Amador Supervisor’s Declaration We hereby declare that the preparation and presentation of the thesis were supervised in accordance with the guidelines on supervision laid down by the University of Cape Coast Principal Supervisor’s Signature………….……… Date………….…… Name: Prof. Joseph Aggrey-Fynn Co-Supervisor’s Signature………………………… Date……………… Name: Prof. John Blay Jnr. ii Digitized by Sam Jonah Library © University of Cape Coast https://erl.ucc.edu.gh/jspui ABSTRACT The ribbonfish, Trichiurus lepturus and golden African snapper, Lutjanus fulgens are actively and locally exploited by commercial fishers along the coast of Ghana. To bridge the knowledge gap on these species, size composition, growth and mortality as well as aspects of reproduction were assessed. Samples were collected from major fish landing sites along the coast of Ghana from September 2018 to August 2019.
[Show full text]
Catalogue of Some Saltwater and Freshwater Fish Species of the Niger Delta Region of Nigeria
Catalogue of Some Saltwater and Freshwater Fish Species of the Niger Delta Region of Nigeria Ekinadose Orose, Edafe Odioko and Okechukwu Kenneth Wokeh * Department of Animal and Environmental Biology, Hydrobiology and Fisheries Unit, University of Port Harcourt, PMB 5323, Port Harcourt, Rivers State, Nigeria. World Journal of Advanced Research and Reviews, 2021, 09(03), 056–084 Publication history: Received on 29 January 2021; revised on 27 February 2021; accepted on 01 March 2021 Article DOI: https://doi.org/10.30574/wjarr.2021.9.3.0075 Abstract The study was done to review some saltwater and freshwater fish species in the Niger Delta region of Nigeria. The Niger Delta is one of the most prominent regions in Nigeria, endowed with several water bodies that are distributed as freshwater like rivers, lakes, streams and creeks. These freshwater ecosystems in the region, are abundantly endowed with fish species such as Clarias gariepinus, Pila ovate, Labeo coubie, Synodontis budgetti and Synodontis eupterus. Apart from the freshwaters, the region also has vast marine ecosystem with abundance of fish species such as Elops lacerta, Mugil cephalus, Thais coronata, Periophthalmus papilio, Tympanotonus fuscatus, and Sardinella maderensis. Unfortunately, many of these fish species are endangered due to constant pollution in the Niger delta regional coastal environment. As a result, it is important to document some available freshwater and marine water fish species which will serve as a reference material for both academics and research institutions, should any of the fish species go into extinction. Keywords: Extinction, Coastal Waters, Marine Diversity, Niger Delta 1. Introduction Nigeria’s coastal waters fall within the Guinea Current Large Ecosystem (GCLME), a shared resource by all the coastal West African countries.
[Show full text]
Intrinsic Vulnerability in the Global Fish Catch
The following appendix accompanies the article Intrinsic vulnerability in the global fish catch William W. L. Cheung1,*, Reg Watson1, Telmo Morato1,2, Tony J. Pitcher1, Daniel Pauly1 1Fisheries Centre, The University of British Columbia, Aquatic Ecosystems Research Laboratory (AERL), 2202 Main Mall, Vancouver, British Columbia V6T 1Z4, Canada 2Departamento de Oceanografia e Pescas, Universidade dos Açores, 9901-862 Horta, Portugal *Email: [email protected] Marine Ecology Progress Series 333:1–12 (2007) Appendix 1. Intrinsic vulnerability index of fish taxa represented in the global catch, based on the Sea Around Us database (www.seaaroundus.org) Taxonomic Intrinsic level Taxon Common name vulnerability Family Pristidae Sawfishes 88 Squatinidae Angel sharks 80 Anarhichadidae Wolffishes 78 Carcharhinidae Requiem sharks 77 Sphyrnidae Hammerhead, bonnethead, scoophead shark 77 Macrouridae Grenadiers or rattails 75 Rajidae Skates 72 Alepocephalidae Slickheads 71 Lophiidae Goosefishes 70 Torpedinidae Electric rays 68 Belonidae Needlefishes 67 Emmelichthyidae Rovers 66 Nototheniidae Cod icefishes 65 Ophidiidae Cusk-eels 65 Trachichthyidae Slimeheads 64 Channichthyidae Crocodile icefishes 63 Myliobatidae Eagle and manta rays 63 Squalidae Dogfish sharks 62 Congridae Conger and garden eels 60 Serranidae Sea basses: groupers and fairy basslets 60 Exocoetidae Flyingfishes 59 Malacanthidae Tilefishes 58 Scorpaenidae Scorpionfishes or rockfishes 58 Polynemidae Threadfins 56 Triakidae Houndsharks 56 Istiophoridae Billfishes 55 Petromyzontidae
[Show full text]
Fish Species Transshipped at Sea (Saiko Sh) in Ghana with a Note On
Fish species transshipped at sea (Saiko ƒsh) in Ghana with a note on implications for marine conservation Denis Worlanyo Aheto ( [email protected] ) Centre for Coastal Management - Africa Centre of Excellence in Coastal Resilience (ACECoR), University of Cape Coast, Ghana https://orcid.org/0000-0001-5722-1363 Isaac Okyere ( [email protected] ) Department of Fisheries and Aquatic Sciences, School of Biological Sciences, University of Cape Coast, Ghana https://orcid.org/0000-0001-8725-1555 Noble Kwame Asare Department of Fisheries and Aquatic Sciences, School of Biological Sciences, University of Cape Coast, Ghana Jennifer Eshilley Department of Fisheries and Aquatic Sciences, School of Biological Sciences, University of Cape Coast, Ghana Justice Odoiquaye Odoi Nature Today, A25 Standards Estates, Sakumono, Tema, Ghana Research Article Keywords: Fish transshipment, saiko, IUU ƒshing, Marine Conservation, Sustainability, Ghana DOI: https://doi.org/10.21203/rs.3.rs-41329/v1 License: This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License Page 1/18 Abstract Increasing global seafood demand over the last couple of decades has resulted in overexploitation of certain ƒsh species by both industrial and small-scale artisanal ƒshers. This phenomenon has threatened the livelihoods and food security of small-scale ƒshing communities especially in the West African sub- region. In Ghana, ƒsh transshipment (locally referred to as saiko) has been catalogued as one more negative practice that is exacerbating an already dire situation. The goal of this study was to characterise transshipped ƒsh species landed in Ghana on the basis of composition, habitat of origin, maturity and conservation status on the IUCN list of threatened species to enhance understanding of the ecological implications of the practice and inform regulatory enforcement and policy formulation.
[Show full text]
Worse Things Happen at Sea: the Welfare of Wild-Caught Fish
[ “One of the sayings of the Holy Prophet Muhammad(s) tells us: ‘If you must kill, kill without torture’” (Animals in Islam, 2010) Worse things happen at sea: the welfare of wild-caught fish Alison Mood fishcount.org.uk 2010 Acknowledgments Many thanks to Phil Brooke and Heather Pickett for reviewing this document. Phil also helped to devise the strategy presented in this report and wrote the final chapter. Cover photo credit: OAR/National Undersea Research Program (NURP). National Oceanic and Atmospheric Administration/Dept of Commerce. 1 Contents Executive summary 4 Section 1: Introduction to fish welfare in commercial fishing 10 10 1 Introduction 2 Scope of this report 12 3 Fish are sentient beings 14 4 Summary of key welfare issues in commercial fishing 24 Section 2: Major fishing methods and their impact on animal welfare 25 25 5 Introduction to animal welfare aspects of fish capture 6 Trawling 26 7 Purse seining 32 8 Gill nets, tangle nets and trammel nets 40 9 Rod & line and hand line fishing 44 10 Trolling 47 11 Pole & line fishing 49 12 Long line fishing 52 13 Trapping 55 14 Harpooning 57 15 Use of live bait fish in fish capture 58 16 Summary of improving welfare during capture & landing 60 Section 3: Welfare of fish after capture 66 66 17 Processing of fish alive on landing 18 Introducing humane slaughter for wild-catch fish 68 Section 4: Reducing welfare impact by reducing numbers 70 70 19 How many fish are caught each year? 20 Reducing suffering by reducing numbers caught 73 Section 5: Towards more humane fishing 81 81 21 Better welfare improves fish quality 22 Key roles for improving welfare of wild-caught fish 84 23 Strategies for improving welfare of wild-caught fish 105 Glossary 108 Worse things happen at sea: the welfare of wild-caught fish 2 References 114 Appendix A 125 fishcount.org.uk 3 Executive summary Executive Summary 1 Introduction Perhaps the most inhumane practice of all is the use of small bait fish that are impaled alive on There is increasing scientific acceptance that fish hooks, as bait for fish such as tuna.
[Show full text]
Poissons Marins De La Sous-Région Nord-Ouest Africaine
COMMISSION EUROPEENNE CENTRE COMMUN DE RECHERCHE Institut de l'Environnement Durable 1-21020 Ispra (VA) Italie Poissons Marins de la Sous-Région Nord-Ouest Africaine par Jan Michael VAKILY, Sékou Balta CAMARA, Asberr Natoumbi M END Y, Yanda MARQUES, Birane SAMB, Abei Jûlio DOS SANTOS, Mohamed Fouad SHERIFF, Mahfoudh OULD TALEE SIDI et Daniel PAUL Y Cap Vert Mauritanie 1 *J* T II Senegal Gambie G'vnée-Bissau II Sierra Leone Guinée 2002 EUR 20379 FR COMMISSION EUROPEENNE CENTRE COMMUN DE RECHERCHE Institut de 1 Environnement Durable 1-21020 Ispra (VA) Italy Poissons Marins de la Sous-Région Nord-Ouest Africaine par Jan Michael Vakily3 , Sékou Balia Camara13, Asberr Natoumbi Mendyc, Vanda Marques0, Birane Sambe , Abei Julio dos Santosi Mohamed Fouad Sheriff6, Mahfoudh Ould Taleb Sidih et Daniel Pauly1 a Centre Commun de Recherche (CCR/IES), IMW Unit (TP 272), 21020 Ispra (VA), Italie b Centre National des Sciences Halieutiques de Boussoura (CNSHB), B.P. 3738, Conakry, Guinée ° Department of Fisheries, 6, Coi. Muammar Ghaddafi Avenue, Banjul, Gambie d Institut National de Développement des Pêches (INDP), CP 132, Mindelo, San Vicente, Cap Vert e Centre de Recherches Océanographiques de Dakar-Thiaroye (CRODT), BP 2241. Dakar, Sénégal f Centro de Investigaçao Pesqueira Aplicada (CIPA), C.P. 102, Bissau, Guinée-Bissau 8 Dep. of Fisheries, Ministry of Agriculture, Forestry & Marine Resources, Freetown, Sierra Leone b Inst. Mauritanien de Recherches Océanographiques et des Pêches (IMROP), B.P. 22, Nouadhibou, Mauritanie ' Fisheries Centre, University of British Columbia, Vancouver, BC V6T 1Z4, Canada 2002 EUR 20379 FR LEGAL NOTICE Neither the European Commission nor any person acting on behalf of the Commission is responsible for the use, which might be made of the following information.
[Show full text]
Review of the State of World Marine Fishery Resources
ISSN 2070-7010 569 FAO FISHERIES AND AQUACULTURE TECHNICAL PAPER 569 Review of the state of world marine fishery resources Review of the state world marine fishery resources This publication presents an updated assessment and review of the current status of the world’s marine fishery resources. It summarizes the information available for each FAO Statistical Areas; discusses the major trends and changes that have occurred with the main fishery resources exploited in each area; and reviews the stock assessment work undertaken in support of fisheries management in each region. The review is based mainly on official catch statistics up until 2009 and relevant stock assessment and other complementary information available until 2010. It aims to provide the FAO Committee on Fisheries and, more generally, policy-makers, civil society, fishers and managers of world fishery resources with a comprehensive, objective and global review of the state of the living marine resources. ISBN 978-92-5-107023-9 ISSN 2070-7010 FAO 9 789251 070239 I2389E/1/12.11 Cover illustration: Emanuela D’Antoni FAO FISHERIES AND Review of the state AQUACULTURE TECHNICAL of world marine PAPER fishery resources 569 Marine and Inland Fisheries Service Fisheries and Aquaculture Resources Use and Conservation Division FAO Fisheries and Aquaculture Department FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS Rome, 2011 The designations employed and the presentation of material in this information product do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations (FAO) concerning the legal or development status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries.
[Show full text]
Download the Full Paper
Int. J. Biosci. 2020 International Journal of Biosciences | IJB | ISSN: 2220-6655 (Print), 2222-5234 (Online) http://www.innspub.net Vol. 17, No. 5, p. 23-33, 2020 RESEARCH PAPER OPEN ACCESS Effectiveness of Catches from Various types of Gears for the estimation of Biodiversity in southwestern Côte d’Ivoire, West Africa Laurent Bahou Département Ressources Aquatiques Vivantes, Centre de Recherches Océanologiques, Rue des Pêcheurs, Treichville, Ivory Coast Key words: Abiotic parameters, Artisanal fishery, Biodiversity, Fishing gears, Selectivity http://dx.doi.org/10.12692/ijb/17.5.23-33 Article published on November 12, 2020 Abstract Samples have been taken from fishery landings on the fishers' return to estimate fish and other aquatic animals diversity. Specimens were caught with various types of gears deployed in continental shelf waters of Côte d’Ivoire by the artisanal fishers residing at Sassandra (in the southwestern part of this country), some 272 kilometres away from Abidjan, the capital city. These gears include the drifting gillnet, stationary gillnet, bottom gillnet, beach seine,purse seine and longline. Here, we present the data collected from October 2017 to March 2019. The results indicated that overall species observed numbered 112 and comprised fish, crustaceans, cephalopods and gastropods. Fish were the most abundant species, accounting for 92.86 % of total species observed in the landings. An attempt was made at comparing our data with the catch data collected a year earlier by the local Office for Aquaculture and Fisheries Statistics (the “Bureau Aquaculture et Pêche”, BAP - Sassandra). Confirmation of fish dominating the catches was obtained, as fish accounted for 95.13 % of total specimens landed and for 99.29 % of the yield, far exceeding Crustaceans, of which pink shrimp Penaeus notialis Pérez- Farfante, 1967 were the commonest.
[Show full text]
830-IJBCS-Article-Myade
Available online at http://ajol.info/index.php/ijbcs Int. J. Biol. Chem. Sci. 5(1): 38-45, February 2011 ISSN 1991-8631 Original Paper http://indexmedicus.afro.who.int Occurrence of finfish communities in trawl hauls of Atlantic Ocean in Badagry coast, Nigeria E. F. MYADE *, M. O. OYEBANJI, E. O. OLUWAJOBA, A. B. WILLIAMS, B. C. MBAWUIKE , N. AJUONU , G. W. OLAKUNLE, O. O. ADEGBILE, A. Y. GADZEKPO, M. U. UMUNNAKWE and M.A. ABASS Nigeria Institute for Oceanography and Marine Research, No 3 Wilmot Point Road, P. M. B. 12729 Victoria Island – Lagos State, Nigeria. * Corresponding author; E-mail: [email protected] ABSTRACT Thirteen trawl hauls were conducted at depths ranging from 10 m – 100 m. Fifty six finfish families were observed, comprising ninety seven species from eighty two genera. Ten commercially important finfish families were identified out of which the Haemulidae had the highest number of occurrence and distribution with catch per unit area (CPUA) of 36.17 Kg/Km 2. The Carangidae with CPUA of 22.09 Kg/Km 2 was the lowest in abundance and distribution of the important finfish families. The total biomass estimate of finfish from the entire survey area under investigation was 440 tons (t). The middle stratum, S2 (30 m – 70 m) had the highest biomass followed by the land adjoining stratum, S1 (10 m -30 m) and the least stratum biomass was obtained from the farthest stratum, S3 (70 m – 100 m). Fishing is optimized in the middle stratum, S2. © 2011 International Formulae Group. All rights reserved. Keywords: Biomass estimate, finfish communities, demersal trawl, Atlantic Ocean, Badagry coast, Nigeria.
[Show full text]
A Revision of Irvine's Marine Fishes of Tropical West Africa
A Revision of Irvine’s Marine Fishes of Tropical West Africa by ALASDAIR J. EDWARDS Tropical Coastal Management Studies, Department of Marine Sciences and Coastal Management, University of Newcastle, Newcastle upon Tyne NE1 7RU, United Kingdom ANTHONY C. GILL Department of Zoology, The Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom and PARCY O. ABOHWEYERE, Nigerian Institute for Oceanography and Marine Research, Wilmot Point Road, Bar-Beach, P.M.B. 12729, Victoria Island, Lagos, Nigeria TABLE OF CONTENTS INTRODUCTION .......................................................................................................................1 SHARKS AND RAYS (EUSELACHII) .......................................................................................4 Sixgill and Sevengill sharks (Hexanchidae) ......................................................................................4 Sand tiger sharks (Odontaspididae) .................................................................................................5 Mackerel sharks (Lamnidae) .........................................................................................................5 Thresher Sharks (Alopiidae) ..........................................................................................................7 Nurse sharks (Ginglymostomatidae) ...............................................................................................7 Requiem sharks (Carcharhinidae) ...................................................................................................8
[Show full text]
MAVA Year4 Finalreport V4.Pdf
PRELIMINARY STOCK ASSESSMENTS OF SMALL PELAGIC FISH POPULATIONS OFF WEST AFRICA Maria. L.D. Palomares, Jessika Woroniak, Simon-Luc Nöel, Gordon Tsui, Brittany Derrick, and Daniel Pauly A report prepared by the Sea Around Us for the MAVA Foundation January 23, 2019 PRELIMINARY SOCK ASSESSMENTS OF SMALL PELAGIC FISH POPULATIONS OFF WEST AFRICA M.L.D. Palomares1, J. Woroniak1, S.-L. Nöel1, G. Tsui1, B. Derrick1, and D. Pauly1 CITE AS: Palomares MLD, Woroniak J, Nöel S-L, Tsui G, Derrick B, Pauly D (2019) Preliminary stock assessments of small pelagic fish populations off West Africa. A report prepared by the Sea Around Us for the MAVA Foundation. The University of British Columbia, Vancouver, 39 p. 1 Sea Around Us, Institute for the Oceans and Fisheries, University of British Columbia, 2202 Main Mall, Vancouver BC V6T1Z4 Canada TABLE OF CONTENTS Executive Summary 1 Introduction 2 Material and Methods 4 − Reconstructed catches vs official catches 4 − Marine Ecoregions vs EEZs 4 − The CMSY method 5 Results and Discussion 7 − Stock summaries reports 8 − Stocks in the countries where MAVA operates 14 − Small pelagic stocks in Northwest Africa 19 − Stock assessments on the Sea Around Us website 25 Acknowledgements 27 References 28 Appendices I. List of West African EEZ and uncertainty 32 scores of reconstructed catches by fisheries sector II. List species in West African marine 35 ecoregions EXECUTIVE SUMMARY An assessment of the status of 376 fish and invertebrate populations (or ‘stocks’; of which 69% are straddling and 18% are small pelagics) belonging to 69 species exploited by fisheries in 13 Marine Ecoregions (MEs) off West Africa, overlapping with the Exclusive Economic Zones (EEZs) of 25 countries was performed using the CMSY method applied to annual catches (1950- 2014) reconstructed by the Sea Around Us.
[Show full text]
GENUS Brachydeuterus Gill, 1862
FAMILY Haemulidae Gill 1885 - grunts, sweetlips SUBFAMILY Haemulinae Gill 1885 - grunts [=Odobranchia, Pristipomides, Haemulona, Xenichthyinae, Boridianini, Haemulonidae, Pomadasidae, Orthopristinae, Inermiidae] GENUS Anisotremus Gill, 1861 - grunts [=Genytremus, Paraconodon] Species Anisotremus caesius (Jordan & Gilbert, 1882) - silvergrey grunt Species Anisotremus davidsonii (Steindachner, 1876) - xantic sargo Species Anisotremus interruptus (Gill, 1862) - burrito grunt Species Anisotremus scapularis (Tschudi, 1846) - Peruvian grunt Species Anisotremus surinamensis (Bloch, 1791) - black margate [=bilineatum, labridum, melanopterum, obtusum, spleniatum] Species Anisotremus taeniatus Gill, 1861 - Panama porkfish Species Anisotremus virginicus (Linnaeus, 1758) - porkfish [=jub, juba, mauritii, rodo] GENUS Boridia Cuvier, in Cuvier & Valenciennes, 1830 - grunts Species Boridia grossidens Cuvier, in Cuvier & Valenciennes, 1830 - Borriqueta porgy [=catharinae] GENUS Brachydeuterus Gill, 1862 - grunts [=Otoperca] Species Brachydeuterus auritus (Valenciennes, in Cuvier & Valenciennes, 1832) - bigeye grunt [=macrophthalmus] GENUS Brachygenys Poey, 1868 - grunts Species Brachygenys californiensis (Steindachner, 1876) - California grunt Species Brachygenys chrysargyreum (Gunther, 1859) - smallmouth grunt [=taeniatum] GENUS Conodon Cuvier, 1830 - grunts [=Apostata, Spinipercina] Species Conodon macrops Hildebrand, 1946 - lemoneye grunt Species Conodon nobilis (Linnaeus, 1758) - barred grunt [=antillanus, coro, magnificus, septemfasciata] Species
[Show full text]