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LEVELS in INDIAN MACKEREL Rastrelliger Kanagurta (SCOMBRIDAE) from KARACHI FISH HARBOUR and ITS RISK ASSESSMENT Quratulan Ahmed1,*, Levent Bat2
9(3): 012-016 (2015) Journal of FisheriesSciences.com E-ISSN 1307-234X © 2015 www.fisheriessciences.com ORIGINAL ARTICLE Research Article MERCURY (Hg) LEVELS IN INDIAN MACKEREL Rastrelliger kanagurta (SCOMBRIDAE) FROM KARACHI FISH HARBOUR AND ITS RISK ASSESSMENT Quratulan Ahmed1,*, Levent Bat2 1The Marine Reference Collection and Resources Centre, University of Karachi, Karachi, 75270 Pakistan 2University of Sinop, Fisheries Faculty, Department of Hydrobiology, TR57000 Sinop, Turkey Received: 03.04.2015 / Accepted: 24.04.2015 / Published online: 28.04.2015 Abstract: The present study was conducted to determine Hg levels in edible tissues of the Indian mackerel Rastrelliger kanagurta collected at Karachi Harbour of Pakistan between March 2013 and February 2014. Hg levels ranged from 0.01 to 0.09 with mean ± SD 0.042 ± 0.023 mg/kg dry wt. The Hg level in R. kanagurta is relatively low when compared to those studied in other parts of the world and is able to meet the legal standards by EU Commission Regulation and other international food standards. The findings obtained were also compared with established allowable weekly intake values. It is concluded that the Hg levels in the Indian mackerel from Karachi coasts did not exceed the permission limits (0.5 mg/kg). The results show that the Indian mackerel appears to be useful bio-indicator due to their accumulation of Hg, however, continued sampling is required for further researches. Keywords: Mercury, Rastrelliger kanagurta, Bio-indicator, Karachi fish harbour, Pakistan *Correspondence to: Quratulan Ahmed, The Marine Reference Collection and Resources Centre, University of Karachi, Karachi, 75270 Pakistan E-mail: [email protected] Tel: +92 (345) 2983586 12 Journal of FisheriesSciences.com Ahmed Q and Bat L 9(3): 012-016 (2015) Journal abbreviation: J FisheriesSciences.com Introduction exposure route possibly allowing metal biomagnification up trophic levels in the Indian mackerel R. -
Ecography ECOG-01937 Hattab, T., Leprieur, F., Ben Rais Lasram, F., Gravel, D., Le Loc’H, F
Ecography ECOG-01937 Hattab, T., Leprieur, F., Ben Rais Lasram, F., Gravel, D., Le Loc’h, F. and Albouy, C. 2016. Forecasting fine- scale changes in the food-web structure of coastal marine communities under climate change. – Ecography doi: 10.1111/ecog.01937 Supplementary material Forecasting fine-scale changes in the food-web structure of coastal marine communities under climate change by Hattab et al. Appendix 1 List of coastal exploited marine species considered in this study Species Genus Order Family Class Trophic guild Auxis rochei rochei (Risso, 1810) Auxis Perciformes Scombridae Actinopterygii Top predators Balistes capriscus Gmelin, 1789 Balistes Tetraodontiformes Balistidae Actinopterygii Macro-carnivorous Boops boops (Linnaeus, 1758) Boops Perciformes Sparidae Actinopterygii Basal species Carcharhinus plumbeus (Nardo, 1827) Carcharhinus Carcharhiniformes Carcharhinidae Elasmobranchii Top predators Dasyatis pastinaca (Linnaeus, 1758) Dasyatis Rajiformes Dasyatidae Elasmobranchii Top predators Dentex dentex (Linnaeus, 1758) Dentex Perciformes Sparidae Actinopterygii Macro-carnivorous Dentex maroccanus Valenciennes, 1830 Dentex Perciformes Sparidae Actinopterygii Macro-carnivorous Diplodus annularis (Linnaeus, 1758) Diplodus Perciformes Sparidae Actinopterygii Forage species Diplodus sargus sargus (Linnaeus, 1758) Diplodus Perciformes Sparidae Actinopterygii Macro-carnivorous (Geoffroy Saint- Diplodus vulgaris Hilaire, 1817) Diplodus Perciformes Sparidae Actinopterygii Basal species Engraulis encrasicolus (Linnaeus, 1758) Engraulis -
Status and Prospects of Mackerel and Tuna Fishery in Bangladesh
Status and prospects of mackerel and tuna fishery in Bangladesh Item Type article Authors Rahman, M.J.; Zaher, M. Download date 27/09/2021 01:00:11 Link to Item http://hdl.handle.net/1834/34189 Bangladesh]. Fish. Res.) 10(1), 2006: 85-92 Status and prospects of mackerel and tuna fishery in Bangladesh M. J. Rahman* and M. Zaher1 Marine Fisheries & Technology Station, Bangladesh Fisheries Research Institute Cox's Bazar 4700, Bangladesh 1Present address: BFRI, Freshwater Station, Mvmensingh 2201, Bangladesh *Corresponding author Abstract Present status and future prospects of mackerel and tuna fisheries in Bangladesh were assessed during July 2003-June 2004. The work concentrated on the fishing gears, length of fishes, total landings and market price of the catch and highlighted the prospects of the fishery in Bangladesh. Four commercially important species of mackerels and tuna viz. Scomberomorus guttatus, Scomberomorus commerson, Rastrelliger kanagurta, and Euthynnus affinis were included in the study. About 95% of mackerels and tuna were caught by drift gill nets and the rest were caught by long lines ( 4%) and marine set-bag-net (1 %). Average monthly total landing of mackerels and tunas was about 264 t, of which 147 t landed in Cox's Bazar and 117 tin Chittagong sites. Total catches of the four species in Cox's Bazar and Chittagong sites were found to be 956 and 762 t, respectively. The poor landing was observed during January-February and the peak landing was in November and July. Gross market value of the annual landing of mackerels and tunas (1,718 t) was found to be 1,392 lakh taka. -
Chub Mackerel, Scomber Japonicus (Perciformes: Scombridae), a New Host Record for Nerocila Phaiopleura (Isopoda: Cymothoidae)
生物圏科学 Biosphere Sci. 56:7-11 (2017) Chub mackerel, Scomber japonicus (Perciformes: Scombridae), a new host record for Nerocila phaiopleura (Isopoda: Cymothoidae) 1) 2) Kazuya NAGASAWA * and Hiroki NAKAO 1) Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8528, Japan 2) Fisheries Research Division, Oita Prefectural Agriculture, Forestry and Fisheries Research Center, Kamiura, Saeki, Oita 879-2602, Japan Abstract An ovigerous female of Nerocila phaiopleura Bleeker, 1857 was collected from the caudal peduncle of a chub mackerel, Scomber japonicus Houttuyn, 1782 (Perciformes: Scombridae), at the Hōyo Strait located between the western Seto Inland Sea and the Bungo Channell in western Japan. This represents a new host record for N. phaioplueura and its fourth record from the Seto Inland Sea and adjacent region. Key words: Cymothoidae, fish parasite, Isopoda, Nerocila phaiopleura, new host record, Scomber japonicus INTRODUCTION The Hōyo Strait is located between the western Seto Inland Sea and the Bungo Channell in western Japan. This strait is famous as a fishing ground of two perciform fishes of high quality, viz., chub mackerel, Scomber japonicus Houttuyn, 1782 (Scombridae), and Japanese jack mackerel, Trachurus japonicus (Temminck and Schlegel, 1844) (Carangidae), both of which are currently called“ Seki-saba” and“ Seki-aji”, respectively, as registered brands (e.g., Ishida and Fukushige, 2010). The brand names are well known nationwide, and the price of the fishes is very high (up to 5,000 yen per kg). Under these situations, the fishermen working in the strait pay much attention to the parasites of the fishes they catch because those fishes are almost exclusively eaten raw as“ sashimi.” Recently, a chub mackerel infected by a large parasite on the body surface (Fig. -
Ices Cooperative Research Report (Crr) on Fish Ageing
ICES COOPERATIVE RESEARCH REPORT (CRR) ON FISH AGEING CHAPTER 5: Small and Medium Pelagic Species Chapter editors: Begoña Villamor and Pierluigi Carbonara Collaborators (alphabetical order): Pablo Abaunza, Naroa Aldanondo, Loes Bolle, Gertrud Delfs, Tomas Gröhsler, Carmen Hernandez, M. Rosario Navarro, Eduardo Soares, Fernando Ramos, Isabel Riveiro, Norbert Rohlf, Jorge Tornero, Jens Ulleweit, Andres Uriarte, Lotte Worsøe Clausen. Contents 1. Introduction .......................................................................................................................... 3 2. Summary of age estimation methodologies........................................................................... 3 2.1. Summary of general age estimation methods and problems ........................................... 9 2.1.1 Anchovy (Engraulis encrasicolus) .............................................................................. 9 2.1.2 Sardine (Sardina pilchardus) ................................................................................... 12 2.1.3 Herring (Clupea harengus) ...................................................................................... 14 2.1.4 Sprat (Sprattus sprattus) ......................................................................................... 15 2.1.5 Mackerel (Scomber scombrus) ................................................................................ 15 2.1.6 Chub mackerel (Scomber Colias) ............................................................................. 17 Figure 2.1.6.4 - Otholith -
Small-Scale Patterns in Distribution and Feeding of Atlantic Mackerel (Scomber Scombrus L.) Larvae in the Celtic Sea with Special Regard to Intra-Cohort Cannibalism
Helgol Mar Res (2001) 55:135–149 DOI 10.1007/s101520000068 ORIGINAL ARTICLE Nicola Hillgruber · Matthias Kloppmann Small-scale patterns in distribution and feeding of Atlantic mackerel (Scomber scombrus L.) larvae in the Celtic Sea with special regard to intra-cohort cannibalism Received: 9 August 2000 / Received in revised form: 31 October 2000 / Accepted: 12 November 2000 / Published online: 10 March 2001 © Springer-Verlag and AWI 2001 Abstract Short-term variability in vertical distribution cannibalism, reaching >50% body dry weight in larva and feeding of Atlantic mackerel (Scomber scombrus L.) ≥8.0 mm SL. larvae was investigated while tracking a larval patch over a 48-h period. The patch was repeatedly sampled Keywords Mackerel larvae · Vertical distribution · Diet · and a total of 12,462 mackerel larvae were caught within Diel patterns · Cannibalism the upper 100 m of the water column. Physical parame- ters were monitored at the same time. Larval length dis- tribution showed a mode in the 3.0 mm standard length Introduction (SL) class (mean abundance of 3.0 mm larvae x¯ =75.34 per 100 m3, s=34.37). Highest densities occurred at In the eastern Atlantic, the highest densities of Atlantic 20–40 m depth. Larvae <5.0 mm SL were highly aggre- mackerel (Scomber scombrus) larvae appear in the Celtic gated above the thermocline, while larvae ≥5.0 mm SL Sea and above the Celtic Shelf in May/June (O’Brien were more dispersed and tended to migrate below the and Fives 1995), where the larvae hatch at the onset of thermocline. Gut contents of 1,177 mackerel larvae the secondary productivity maximum (Colebrook 1986) (2.9–9.7 mm SL) were analyzed. -
SPAWNING BEHAVIOUR and FECUNDITY of the INDIAN MACKEREL, RASTRELLIGER KANAGURTA (CUVIER), at MANGALORE Central Marine Fisheries
CORE Metadata, citation and similar papers at core.ac.uk Provided by CMFRI Digital Repository SPAWNING BEHAVIOUR AND FECUNDITY OF THE INDIAN MACKEREL, RASTRELLIGER KANAGURTA (CUVIER), AT MANGALORE V. RAMAMOHANA RAO Central Marine Fisheries Research Institute; Sub-station, Visakhapatnam-3 The earliest reference to the fecundity of the Indian mackerel was by Devanesan and John (1940) who estimated the number of ripe eggs in the mackerel ovary as 94,000. Subsequent work was directed mostly towards finding out the spawning behaviour of this fish, by the study of the intra-ovarian eggs. Pradhan (1956) indicated the possibility of the Indian mackerel spawning the eggs in successive batches over a prolonged period, like its Atlantic counter-part Scomber scombrus (L). Pra dhan and Palekar (1956) described the maturity stages I to VII, based on the external appearance of the ovary, its size relative to the abdominal cavity, and the range of ova-diameter readings. However, they have not given any ova-diameter frequency polygons. Sekharan (1958) studied the ova-diameter frequency in a few ovaries of the mackerel, ranging in maturity stage from II-III to V-VI, VI-VII and a few spent ovaries. He stated that his investigation showed a possibility of the mackerel eggs ripening in batches and of their release in succession. Radhakrishnan (1962), adopting the method followed by Clark (1934), Prabhu (1956), and Qasim and Qayyam (1961), studied the ova-diameter frequency seasonally and indicated the possibility of the mackerel shedding its eggs in batches. Vijayaraghavan (1962) followed a different procedure. Employing very high magnification, he measured ova with diameter greater than 0.525 mm. -
Investigations on the Biology of Indian Mackerel Rastrelliger Kanagurta
Investigations on the biology of Indian Mackerel Rastrelliger kanagurta (Cuvier) along the Central Kerala coast with special reference to maturation, feeding and lipid dynamics Thesis submitted to Cochin University of Science and Technology in partial fulfillment of the requirement for the degree of DOCTOR OF PHILOSOPHY FACULTY OF MARINE SCIENCES GANGA .U. Reg. No. 2763 DEPARTMENT OF MARINE BIOLOGY, MICROBIOLOGY AND BIOCHEMISTRY SCHOOL OF MARINE SCIENCES COCHIN UNIVERSITY OF SCIENCE AND TECHNOLOGY KOCHI – 682 016, INDIA September 2010 DECLARATION I, Ganga. U., do hereby declare that the thesis entitled “Investigations on the biology of Indian Mackerel Rastrelliger kanagurta (Cuvier) along the Central Kerala coast with special reference to maturation, feeding and lipid dynamics “ is a genuine record of research work carried out by me under the guidance of Prof. (Dr.) C.K. Radhakrishnan, Emeritus Professor, Cochin University of Science and Technology, and no part of the work has previously formed the basis for the award of any Degree, Associateship and Fellowship or any other similar title or recognition of any University or Institution. Ganga.U Kochi – 16 September-2010 CERTIFICATE This is to certify that the thesis entitled “Investigations on the biology of Indian Mackerel Rastrelliger kanagurta (Cuvier) along the Central Kerala coast with special reference to maturation, feeding and lipid dynamics” to be submitted by Smt. Ganga. U., is an authentic record of research work carried out by her under my guidance and supervision in partial fulfilment of the requirement for the degree of Doctor of Philosophy of Cochin University of Science and Technology, under the faculty of Marine Sciences. -
Mackerel Scomber Scombrus on Zooplankton*
MARINE ECOLOGY - PROGRESS SERIES I Vol. l?: 65-75, 1984 Published April 26 Mar. Ecol. Prog. Ser. I Diets and selective feeding by larvae of Atlantic mackerel Scomber scombrus on zooplankton* William T. Peterson and Seth J. Ausubel Marine Sciences Research Center, State University of New York at Stony Brook. Stony Brook, New York 11794,USA ABSTRACT: This paper describes the diets of 201 larvae of Atlantic mackerel Scomber scombrus L. collected from Long Island Sound, New York (USA) during May-June 1982 and 1983. First-feeding larvae (3.5 mm in length) were phytophagous. The diets of larvae 4.5 mm were composed of the nauplii of Acartia hudsonica, Temora longicornis and Pseudocalanus sp. Larvae > 5 mm ate some copepodites of A. hudsonica and T. longicornis and smaller proportions of phytoplankton and copepod nauplii. Mackerel 3 6.5 mm were cannibalistic, eating larvae 3.5 to 4.5 mm in length. Weight of stomach contents averaged 1.8 % of an individual's body weight. We calculated that, in order to satisfy its daily energy requirement, a mackerel larva must consume 25 to 75 % of its body weight per day. Larvae fed selectively, taking a greater proportion of T. longicornis and Pseudocalanus sp. nauplii and a lesser proportion of A. hudsonica nauplii than expected by chance alone. Ivlev index values for T. longicomis nauplii were +0.66,for Pseudocalanussp., +0.25, and for A. hudsonica, -0.55. The Chesson index and Pearre's 'C' yielded the same result. We hypothesize that mackerel larvae select food primarily on the basis of prey visibility (both Pseudocalanus sp. -
Fishes of the Subfamily Scomberomorin^ (Family Scombrid^) from Indian Waters
ON FISHES OF THE SUBFAMILY SCOMBEROMORIN^ (FAMILY SCOMBRID^) FROM INDIAN WATERS BY S. JONES AND E. G. SILAS (Central Marine Fisheries Research Institute) INTRODUCTION WHILE hardly a dozen species of Spanish mackerels or seerfishes are recog nisable at present from the warmer waters of the Indo-Pacific and the Atlantic^ only recently has the nomenclature used to denote these, attained any degree of stability. Though some workers may be still inclined to treat Scombero- morus Lacepede, and Acanthocybium Gill, under two separate families or sub families, for reasons given elsewhere (Jones and Silas, 1960, 376), it is felt that for all practical purposes it will be desirable to treat these as two distinct genera under the subfamily Scomberomorinae of the family Scombridae. In the course of the present study we have encountered only three species of Spanish mackerels from the Indian coast. Although this number may be considered to be too few, we have often found field-workers unable to correctly identify them when confronted with them in the fresh state in the fish-landing centres. Since the Spanish mackerels constitute an important coastal pelagic fishery along most parts of the Indian coast, and as often two or all three species are landed with the same type of gear or different types of gear at the same place, it is imperative that stress be also laid on accuracy in species determination. It is hoped that this brief review will help fishery workers in their study on this group of fishes.* The methodology used for body proportions, and collection of other data, does not deviate from that given for 'Indian Tunas' (Jones and Silas^ 1960, p. -
Changes in the Spawning Distribution and Biomass of Atlantic Mackerel (Scomber Scombrus) in the Western Atlantic Ocean Over 4 De
120 National Marine Fisheries Service Fishery Bulletin First U.S. Commissioner established in 1881 of Fisheries and founder NOAA of Fishery Bulletin Abstract—The Atlantic mackerel Changes in the spawning distribution and biomass (Scomber scombrus) has a wide distri- bution off North America that changes of Atlantic mackerel (Scomber scombrus) in the substantially seasonally and interan- nually, challenging attempts to track western Atlantic Ocean over 4 decades changes in stock size. We used egg col- lections to develop an index of spawning David E. Richardson (contact author)1 stock biomass for the southern contin- Lauren Carter2 gent of Atlantic mackerel that spawns 3 in U.S. waters. These results were com- Kiersten L. Curti 2 bined with those from an egg survey of Katrin E. Marancik the northern contingent that spawns Martin Castonguay4 in the Gulf of St. Lawrence, Canada, to develop the only available stock- Email address for contact author: [email protected] wide index. Egg production of Atlantic mackerel in the western North Atlan- 1 3 tic Ocean has dropped >90% from the Northeast Fisheries Science Center Northeast Fisheries Science Center 1980s to the 2010s. The contribution of National Marine Fisheries Service, NOAA National Marine Fisheries Service, NOAA the southern contingent has generally 28 Tarzwell Drive 166 Water Street been around 5–10%, except for during Narragansett, Rhode Island 02882 Woods Hole, Massachusetts 02543 the late 1970s and early 1980s when it 2 Integrated Statistics 4 Maurice Lamontagne Institute was 30–40%. On the continental shelf of 28 Tarzwell Drive Fisheries and Oceans Canada the northeastern United States, there Narragansett, Rhode Island 02882 850 de la Mer Road has been a northeastward shift in the Mont-Joli, Quebec G5H 3Z4, Canada distribution of eggs of Atlantic mack- erel, with low levels of egg production recently at the historically important spawning location off southern New England. -
Length-Weight Relationships in Three Marketable Sized Mackerel Fish Species Collected from Karachi Fish Harbour, Pakistan
AHMED ET AL (2014), FUUAST J. BIOL., 4(1): 107-111 LENGTH-WEIGHT RELATIONSHIPS IN THREE MARKETABLE SIZED MACKEREL FISH SPECIES COLLECTED FROM KARACHI FISH HARBOUR, PAKISTAN. QURATULAN AHMED, FARZANA YOUSUF, KANWAL NAZIM, AND MUHAMMAD UZAIR KHAN Marine Reference Collection and Resource Center (MRCC), University of Karachi-Karachi Pakistan Corresponding author; [email protected] Abstract Fish is a source of highly nutritive protein and play an important role in food chain. Total 177 specimen of Rastrelliger kanagurta, 119 specimen of Scomberomorus commerson, and 108 specimen of Scomberomorus guttatus were collected from Karachi fish harbour during August, 2006 to December, 2008. The maximum mean length (24.17+0.28 cm) and mean weight (134.6+2.583 g) of Rastrelliger kanagurta were recorded during spring 2007-2008. In Scomberomorus commerson highest mean length (48.8+0.22 cm) and weight mean (726.15 +8.48 g) were measured during winter 2006-2007 and 2007-2008 respectively. The highest mean length of Scomberomorus guttatus (51.22+0.11 cm) and weight mean (701.9 + 10.09) were recorded in during spring (2006-2007). Our result showed that Rastrelliger kanagurta fish estimated negative allometric growth because b values less then 3. Fish Scomberomorus commerson, Scomberomorus guttatus, showed positive and negative allometric growth because b value shows were larger b<3 or smaller b>3. Introduction The family Scombridae, the mackerels, tunas, and bonitos, some of the world‟s most popular food fishes. Scombrids are pelagic fishes living in tropical and subtropical seas however, some species move seasonally into temperate or cold waters. This family is also known as the fastest-swimming fishes in the world.