alexa Ecological and Biodiversity Friendly Approach to Post Larval Shrimp (PLS) Collection in Ghana | OMICS International
ISSN: 2150-3508

Fisheries and Aquaculture Journal
Open Access

OMICS International organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations

700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)

Research Article

Ecological and Biodiversity Friendly Approach to Post Larval Shrimp (PLS) Collection in Ghana

George A Darpaah*

Department of Animal Biology and Conservation Science, University of Ghana, P.O. Box LG 67, Legon, Ghana

*Corresponding Author:
George A Darpaah
E-mail: [email protected], [email protected]

Accepted date:February 09, 2013; Published date: February 21, 2013

Abstract

A new approach to post larval shrimp (PLS) collection using a locally designed PLS trawler has been successfully tried in the Volta Estuary of Ghana for 3 years (2000, 2002 and 2005). The PLS trawler had 4 major components: the pulley system, the post larvae (PL) collector, the control room and a work space. The PL collector had an aperture area of 0.433 m2 and a volume of 0.389 m3. Trawling for PLS was made at designated water depths at trawl speed of approximately 0.25 knots (0.128 m/s). Each trawl session lasted for 10 min and was replicated. The distance traversed by the PL collector in a trawl session was estimated at 77.07 m and covered a swept area of 33.40 m2. The associated volume of water filtered through the PL collector was 33.38 m³. The average number of PLS collected per trawl session ranged from 682 6 604 to 758 6 761 at high tide and from 324 6 273 to 414 6 248 at low tide. The ‘other larvae’ (OL) (by-catch discards) collected in the PL collector comprised of the larvacean, Oikopleura spp.; the chaetognatha, Parasagitta (Sagittidae) spp.; crab larvae and fish larvae. Mean OL numbers collected for each trawl session ranged from 295 6 188 to 349 6 292 at high tide and from 257 6 164 to 396 6 261 at low tide. Total PLS collected over 36 trawl months spread over a period of 3 years was 39,549. The corresponding OL numbers was estimated at 21,543. The OL (by-catch discards) to PLS ratio per trawl session was thus estimated at 54.47%. The comparatively low catches of the OL was attributed to the combined effect of the filtering
efficiency of the 500 μ mesh PL collector net, the ability of the PL trawler to sample at variable water depths and the relatively shorter time of 10 min used in a trawl session. This method of PLS collection would provide a viable and reliable alternative to the marine resources (by-catch) destruction which accompanies wild PLS harvest and also ensure biodiversity preservation in the Ghanaian coastal region. The mode of operation of the PL trawler and its operational efficiency is presented and discussed.

Keywords

Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri & Aquaculture Journals

Dr. Krish

[email protected]

1-702-714-7001Extn: 9040

Biochemistry Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Business & Management Journals

Ronald

[email protected]

1-702-714-7001Extn: 9042

Chemistry Journals

Gabriel Shaw

[email protected]

1-702-714-7001Extn: 9040

Clinical Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Engineering Journals

James Franklin

[email protected]

1-702-714-7001Extn: 9042

Food & Nutrition Journals

Katie Wilson

[email protected]

1-702-714-7001Extn: 9042

General Science

Andrea Jason

[email protected]

1-702-714-7001Extn: 9043

Genetics & Molecular Biology Journals

Anna Melissa

[email protected]

1-702-714-7001Extn: 9006

Immunology & Microbiology Journals

David Gorantl

[email protected]

1-702-714-7001Extn: 9014

Materials Science Journals

Rachle Green

[email protected]

1-702-714-7001Extn: 9039

Nursing & Health Care Journals

Stephanie Skinner

[email protected]

1-702-714-7001Extn: 9039

Medical Journals

Nimmi Anna

[email protected]

1-702-714-7001Extn: 9038

Neuroscience & Psychology Journals

Nathan T

[email protected]

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

Ann Jose

[email protected]

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

[email protected]

1-702-714-7001Extn: 9042

 
© 2008- 2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version