Snail Farming: Boost to Agriculture Export
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Snail Production in Bayelsa State, Nigeria: Technologies, Productivity and Enhancement Measures
SNAIL PRODUCTION IN BAYELSA STATE, NIGERIA: TECHNOLOGIES, PRODUCTIVITY AND ENHANCEMENT MEASURES BY SUWARI, GOD’STIME SAMUEL PG/Ph.D/04/35563 DEPARTMENT OF VOCATIONAL TEACHER EDUCATION (AGRICULTURAL UNIT) UNIVERSITY OF NIGERIA, NSUKKA SUPERVISOR: DR. R.O. MAMA OCTOBER, 2010. 2 TITLE PAGE SNAIL PRODUCTION IN BAYELSA STATE, NIGERIA: TECHNOLOGIES, PRODUCTIVITY AND ENHANCEMENT MEASURES BY SUWARI, GOD’STIME SAMUEL PG/Ph.D/04/35563 A THESIS REPORT SUBMITTED TO THE DEPARTMENT OF VOCATIONAL TEACHER EDUCATION, UNIVERSITY OF NIGERIA, NSUKKA; IN PARTIAL FULFILLMENT OF THE REQUIREMENT FOR THE AWARD OF Ph.D DEGREE IN AGRICULTURAL EDUCATION SUPERVISOR: DR. R.O. MAMA OCTOBER, 2010. 2 3 APPROVAL PAGE This thesis has been approved for the Department of Vocational Teacher Education, University of Nigeria, Nsukka. By ………………………….. ………………………… Dr. R.O. Mama (Supervisor) Internal Examiner ………………………… ………………………. Prof. E.E. Agomuo External Examiner (Head of Department) …………………………… Prof. S.A. Ezeudu (Dean, Faculty of Education) 3 4 CERTIFICATION SUWARI, GOD’STIME SAMUEL, a postgraduate student in the Department of Vocational Teacher Education (Agriculture) with Registration Number PG/Ph.D/04/35563, has satisfactorily completed the requirements for the research work for the degree of Doctor of Philosophy in Agricultural Education. The work embodied in this thesis is original and has not been submitted in part or full for any Diploma or Degree of this University or any other University. ………………………………….. ……………………… SUWARI, GOD’STIME SAMUEL DR. R.O. MAMA Student Supervisor 4 5 DEDICATION To: Almighty God from whom mercy, knowledge, wisdom and understanding come and who has made me what I am today. 5 6 ACKNOWLEDGEMENTS The researcher wishes to express his profound gratitude to the project supervisor, Dr. -
Husbandry of the Carnivorous Land Snail, Powelliphanta Augusta (Gastropoda: Pulmonata: Rhytdidae)
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by ResearchArchive at Victoria University of Wellington Husbandry of the Carnivorous Land Snail, Powelliphanta augusta (Gastropoda: Pulmonata: Rhytdidae) By Thomas Edward Allan A thesis submitted to the Victoria University of Wellington in fulfillment of the requirements for the degree of Master of Science in Ecological Restoration Victoria University of Wellington 2010 1 Abstract Key aspects of the captive husbandry of Powelliphanta augusta, a newly-described New Zealand land snail are investigated: how they should be managed and fed to provide individuals for release, and how a long-term captive population can be maintained as an insurance against extinction in the wild. This project arises from almost all members of this species having been brought into captivity due to their displacement in the wild by an opencast coalmine. Powelliphanta (F: Rhytididae) is a genus of endemic carnivorous snails, which includes 10 species, 27 subspecies and numerous undescribed taxa. As well as its diversity, Powelliphanta is renowned for the large size of its members (up to 90mm diameter) and their attractively-patterned shells. Most taxa are threatened due to habitat loss and predation by introduced mammalian predators. The study commences with a literature review to refine husbandry methods and to assess requirements for captive breeding of snails. From this review investigations are made into stocking densities, substrate, reproductive biology, body condition and growth of the P. augusta captive population. To determine an appropriate stocking density for P. augusta groups of six snails were kept at two densities; with either 720cm2, or 1440cm2 per group. -
Mollusca Three Classes
Mollusca Three Classes 1. Gastropoda (gastropods)~ slugs and snails 2. Bivalvia (bivalves) ~ clams and other two- shelled shellfish 3. Cephalopoda (cephalopods) ~ squids, octopuses and cuttlefish 1 Bodies of Mollusks • A mollusk has a soft body which is usually covered by a hard outer shell. • Exceptions: – Slugs and octopuses have lost their shells through evolution – Squids have very reduced shells Anatomy of a Mollusk • All mollusks have: – Foot ~ the muscular foot helps it move – Visceral mass ~ contains the gills, gut, and other organs – Mantle ~ covers the visceral mass to protect the mollusks without shells • Most mollusks have: – Shell ~ protects the mollusk from predators and keeps land mollusks from drying out. 2 Symmetry of Mollusks • Mollusks have bilateral symmetry. – The two halves of the body mirror each other. Anatomy of a Snail (gastropod) 3 Anatomy of a Clam (bivalve) Anatomy of a Squid (cephalopod) 4 Eating Behaviors • Bivalves (clams) ~ filter tiny plant and bacteria from the water • Gastropods (snails) ~ eat with a radula (tiny tongue covered with teeth. – The radula is used to scrape algae off rocks and pieces of leaves and seaweed • Cephalopods (squid) ~use tentacles to grab their prey and put it in their powerful jaws. Blue-ringed octopus 5 Market Squid Moon Snail chasing its food 6 Achatina fulica Giant African Land Snail The largest land snail known is the Giant African Land Snail. It can weigh up to 2 pounds and be 15 inches long. Commonly Eaten Mollusks cockles conch oysters clams scallops abalone whelks Mussels Pen shells 7. -
Effects of Trematode Infection on Metabolism and Activity in a Freshwater Snail, Semisulcospira Libertina
DISEASES OF AQUATIC ORGANISMS Vol. 45: 141–144, 2001 Published June 20 Dis Aquat Org Effects of trematode infection on metabolism and activity in a freshwater snail, Semisulcospira libertina Kazuko Shinagawa*, Misako Urabe**, Makoto Nagoshi*** Department of Biological Science, Faculty of Science, Nara Women’s University, Kitauoyanishi-machi, Nara 630-8506, Japan ABSTRACT: Changes in the metabolism and activity of the freshwater snail Semisulcospira libertina infected with larval trematodes were studied experimentally. In snails up to 11 mm in shell width, crawling distance, feeding frequency, and the proportion of individuals located on vertical walls did not differ among snails infected with mature or immature cercariae, or uninfected snails (p > 0.05). In snails larger than 11 mm, individuals infected with mature cercariae tended to feed more frequently during the light period (p = 0.0081), but the distance they crawled and the proportion of individuals located on vertical walls did not differ, regardless of infection (p > 0.05). Infection with mature cer- cariae significantly increased the oxygen consumption rate (p = 0.016), which was measured only in the large size. KEY WORDS: Semisulcospira libertina · Larval trematodes · Activity · Metabolism Resale or republication not permitted without written consent of the publisher INTRODUCTION of many species of trematodes (Ito 1964, 1988). We reported that snails infected with larval trematodes Many studies have reported the behavioral alter- were found in deeper locations than uninfected snails ation of hosts caused by parasitic infection and inter- (Shinagawa et al. 1999a). The pattern of water depth pret this as an induced adaptation by parasites to selection by infected and uninfected snails also dif- facilitate transfer to the next-stage hosts. -
249 Heliciculture As a Tool for Rural Development In
HELICICULTURE AS A TOOL FOR RURAL DEVELOPMENT IN SOUTHERN TRANSYLVANIA 1 2 VOICHITA GHEOCA , LETI ȚIA OPREAN 1“Lucian Blaga” University of Sibiu, Faculty of Sciences, 2“Lucian Blaga” University of Sibiu, Faculty of Agricultural Sciences, Food Industry and Environmental Protection , 5-7 Dr. I Ra ţiu St., RO – 550012, Sibiu, Romania [email protected] ABSTRACT In Romania there is no tradition as regards the consumption of snails. After several decades of land snails populations’ exploitation for international trade, in the last decade the farming of edible snails has evolved in Romania. The expansion of this practice was encouraged by the SAPARD Program and several foreign companies, promising a quick and easily obtained benefit. About 650 snail farms were established in Romania between the years 2004-2008, most of them using the Italian method, with Helix aspersa in pastures. However, this method had proved its deficiency in the given environmental conditions, leading to high mortality rates. An autochthonous method was developed using H. pomatia , applied by farmers organized in a cooperative, and which have invested in their own processing factory in southern Transylvania, aiming to obtain valuable biologic products. Both the individual farmers and the cooperative were not able to sustain the losses registered during the first years, and find a market for their products, a situation that lead to the collapse of heliciculture in Romania. Despite the unfortunate experience, this new agricultural activity has the potential of a profitable practice in Romania, and especially in Transylvania, not just due to the demand of the European market, but also to the climatic conditions, which make possible the snail farming. -
Endemic Land Snail Fauna (Mollusca) on a Remote Peninsula in the Ogasawara Archipelago, Northwestern Pacific1
Endemic Land Snail Fauna (Mollusca) on a Remote Peninsula in the Ogasawara Archipelago, Northwestern Pacific1 Satoshi Chiba2,3, Angus Davison,4 and Hideaki Mori3 Abstract: Historically, the Ogasawara Archipelago harbored more than 90 na- tive land snail species, 90% of which were endemic. Unfortunately, about 40% of the species have already gone extinct across the entire archipelago. On Haha- jima, the second-largest island and the one on which the greatest number of species was recorded, more than 50% of species are thought to have been lost. We report here the results of a recent survey of the snails of a remote peninsula, Higashizaki, on the eastern coast of Hahajima. Although the peninsula is small (@0.3 km2) and only part is covered by forest (<0.1 km2), we found 12 land snail species, all of which are endemic to Ogasawara. Among these species, five had been thought to already be extinct on Hahajima, including Ogasawarana yoshi- warana and Hirasea acutissima. Of the former, there has been no record since its original description in 1902. Except for the much larger island of Anijima and the main part of Hahajima, no single region on the Ogasawara Archipelago maintains as great a number of native land snail species. It is probable that the land snail fauna of the Higashizaki Peninsula is exceptionally well preserved be- cause of a lack of anthropogenic disturbance and introduced species. In some circumstances, even an extremely small area can be an important and effective refuge for threatened land snail faunas. The native land snail fauna of the Pacific one such example: of 95 recorded species, islands is one of the most seriously endan- more than 90% are endemic (Kuroda 1930, gered faunas in the world (e.g., Murray et al. -
(Archachatina Marginata) FED MILK LEAF (Euphorbia Heterophylla) SUPPLEMENTED with CALCIUM from THREE SOURCES (EGG SHELL, OYSTER SHELL and BONE MEAL) O.O
European Journal of Agriculture and Forestry Research Vol.3, No.3, pp.28-33, July 2015 ___Published by European Centre for Research Training and Development UK (www.eajournals.org) PERFORMANCE OF GROWING SNAILS (Archachatina Marginata) FED MILK LEAF (Euphorbia heterophylla) SUPPLEMENTED WITH CALCIUM FROM THREE SOURCES (EGG SHELL, OYSTER SHELL AND BONE MEAL) O.O. Babalolaab*, P.A. Oyewusib, B.N. Adelekeb aDepartment of Biological Sciences, Landmark University, P.M.B. 1001, Omu-Aran, Kwara State, Nigeria. bDepartment of Science Technology, Federal Polytechnic, P.M.B. 5351, Ado-Ekiti, Ekiti State, Nigeria. ABSTRACT: An experiment was conducted to study the performance of growing snails fed a basal diet of milk leaf (Euphorbia heterophylla) supplemented with calcium from three sources (egg shell, oyster shell and bone meal). A total of 120 growing snails with weight range of 100- 110g were randomly allotted to four treatment groups (T1, T2, T3 and T4), replicated three times with 10 snails per replicate in a completely randomized design. The snails on T1, T2 and T3 were fed with milk leaf supplemented with egg shell, oyster shell and bone meal as calcium sources respectively. T4 consisted of snails fed with milk leaf alone. The feeding trial lasted 13 weeks. Calcium supplements analysed contained 73.6% calcium for eggshell, 59.4% calcium for oyster shell and 33.2% calcium for bone meal. The results showed that the total weight gain, shell length, shell width and shell thickness was highest with snails on egg shell (T1). Snails on bonemeal as the calcium supplement (T3) recorded the highest mortality of 40% and had the poorest performance which was similar to those of snails on control diet of milk leaf alone (T4). -
북한강 참다슬기, Semisulcospira Coreana (V. Martens) 의 번식생태
Korean J. Malacol. 28(2): 175-185, 2012 북한강 참다슬기, Semisulcospira coreana (v. Martens) 의 번식생태 김대희, 방인철1, 이완옥, 백재민 국립수산과학원 중앙내수면연구소, 1순천향대학교 생명시스템학과 Reproductive Ecology of the Freshwater Melania Snail, Semisulcospira coreana (v. Martens) in Bukhan River Dae-Hee Kim, In-Chul Bang1, Wan-Ok Lee and Jae-Min Baek National Fisheries Research and Development Institute, Inland Fisheries Research Institute, Gapyeong 477-815, Korea 1Department of Life Science and Biotechnology, Soonnchunhyang University, Asan 336-745, Korea ABSTRACT To clarify reproductive ecology of the melania snail Semisulcospira coreana (v. Martens, 1886) in Bukhan River, gonad development, fatness, gonad index, sex ratio, first sexual maturity of population, monthly change of larvae number and developmental stages in brood pouches were investigated by six identification methods. As maturation progrsses, the sex of the snali can be distinguishable easily by color:: the ovary being blue-green and testis light yellow. The sex ratio of female to male individuals over 13.95 mm shell height was significantly different from 1:1 (χ2 = 38.45, p < 0.05). The sex ratio of female to male individuals changed drastically according to the season, Based on the monthly variations of fatness, gonad index and histological analysis, spawning occurred twice a year (spring and autumn) and the mean size of matured eggs was 450 μm in diameter. The monthly change of larval number in brood pouch showed also two distinct peaks in March and September during the year. The average number of larvae in brood pouches was 286 - 862 individuals. In this study, the number of larvae in the brood pouches were a minimum in December and a maximum in March (975 larvae). -
Fauna of New Zealand Website Copy 2010, Fnz.Landcareresearch.Co.Nz
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Stimulation of Genital Eversion in the Land Snail Helix Aspersa by Extracts of the Glands of the Dart Apparatus DANIEL J.D
THE JOURNAL OF EXPERIMENTAL ZOOLOGY 238:129-139 (1986) Stimulation of Genital Eversion in the Land Snail Helix aspersa by Extracts of the Glands of the Dart Apparatus DANIEL J.D. CHUNG Division of Biological Sciences, and Museum of Zoology, University of Michigan, Ann Arbor, MI 48109 ABSTRACT The dart apparatus, used during courtship in some groups of hermaphroditic land snails, has long been assumed to have a “stimulatory” effect on the mating partner, though how stimulation occurs and exactly what function it serves has never been determined. In this study, extracts of the mucous glands of the dart apparatus of the land snail Helix aspersa were injected into conspecifics and into a related snail, Cepaea nemoralis, in order to test the hypothesis that the dart is used to achieve inflow of bioactive mucous gland secretions into the darted snail. Helix aspersa injected with the extract responded by everting their terminal genitals; eversion normally takes place during courtship and mating. Boiling the extract increased the bioactiv- ity. Pronase-treated extract lost bioactivity, and gel filtration of the boiled extract indicated that the active substance has a molecular weight of about 5,000. The active substance may be a polypeptide. Cepaea nemoralis also everted their genitals when injected with the boiled Helix extract. The active substance appears to be a contact sex pheromone, the second such pheromone in a pulmonate land snail for which experimental evidence has been obtained. Accessory organs in the terminal genitalia dart might cause increased tonus of the pen- of the hermaphroditic land snail order Sty- ial muscles. -
Os Nomes Galegos Dos Moluscos 2020 2ª Ed
Os nomes galegos dos moluscos 2020 2ª ed. Citación recomendada / Recommended citation: A Chave (20202): Os nomes galegos dos moluscos. Xinzo de Limia (Ourense): A Chave. https://www.achave.ga /wp!content/up oads/achave_osnomesga egosdos"mo uscos"2020.pd# Fotografía: caramuxos riscados (Phorcus lineatus ). Autor: David Vilasís. $sta o%ra est& su'eita a unha licenza Creative Commons de uso a%erto( con reco)ecemento da autor*a e sen o%ra derivada nin usos comerciais. +esumo da licenza: https://creativecommons.org/ icences/%,!nc-nd/-.0/deed.g . Licenza comp eta: https://creativecommons.org/ icences/%,!nc-nd/-.0/ ega code. anguages. 1 Notas introdutorias O que cont!n este documento Neste recurso léxico fornécense denominacións para as especies de moluscos galegos (e) ou europeos, e tamén para algunhas das especies exóticas máis coñecidas (xeralmente no ámbito divulgativo, por causa do seu interese científico ou económico, ou por seren moi comúns noutras áreas xeográficas) ! primeira edición d" Os nomes galegos dos moluscos é do ano #$%& Na segunda edición (2$#$), adicionáronse algunhas especies, asignáronse con maior precisión algunhas das denominacións vernáculas galegas, corrixiuse algunha gralla, rema'uetouse o documento e incorporouse o logo da (have. )n total, achéganse nomes galegos para *$+ especies de moluscos A estrutura )n primeiro lugar preséntase unha clasificación taxonómica 'ue considera as clases, ordes, superfamilias e familias de moluscos !'uí apúntanse, de maneira xeral, os nomes dos moluscos 'ue hai en cada familia ! seguir -
Carbon Footprint of Heliciculture: a Case Study from an Italian Experimental Farm
See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/284929489 Carbon footprint of heliciculture: A case study from an Italian experimental farm ARTICLE in AGRICULTURAL SYSTEMS · FEBRUARY 2016 Impact Factor: 2.91 · DOI: 10.1016/j.agsy.2015.11.010 READS 24 4 AUTHORS: Annachiara Forte Amalia Zucaro University of Naples Federico II University of Naples Federico II 9 PUBLICATIONS 24 CITATIONS 27 PUBLICATIONS 155 CITATIONS SEE PROFILE SEE PROFILE Gionata De Vico Angelo Fierro University of Naples Federico II University of Naples Federico II 99 PUBLICATIONS 989 CITATIONS 24 PUBLICATIONS 189 CITATIONS SEE PROFILE SEE PROFILE All in-text references underlined in blue are linked to publications on ResearchGate, Available from: Gionata De Vico letting you access and read them immediately. Retrieved on: 10 January 2016 Agricultural Systems 142 (2016) 99–111 Contents lists available at ScienceDirect Agricultural Systems journal homepage: www.elsevier.com/locate/agsy Carbon footprint of heliciculture: A case study from an Italian experimental farm Annachiara Forte a,⁎, Amalia Zucaro a,GionataDeVicoa, Angelo Fierro a,b a Dipartimento di Biologia, Università di Napoli Federico II, Italy b Laboratorio di Urbanistica e di Pianificazione del Territorio (LUPT), Università di Napoli Federico II, Italy article info abstract Article history: Heliciculture for food production has huge potential and new opportunities for rural development and young en- Received 18 March 2015 trepreneurs in Italy. No studies have yet been performed on the environmental performance of snail rearing Received in revised form 10 November 2015 which also might be a beneficial tool for producers. The aim of the present paper is to evaluate the impact of Accepted 18 November 2015 snail meat by a cradle-to-farm gate life cycle assessment centred on the carbon footprint (CF).