Abstract Gillnets are used world-wide for harvesting groundfish and pelagic species at sea in freshwater. Little consideration has been given to how fish caught gillnets, even though the capture mode provides valuable information understanding gear catchability. This paper describes a new method of estimating length-dependent modes gillnets. Using this method, we investigated cod (Gadus morhua)...

The aim of this research was to determine the condition and status shrimp fisheries in Bintuni, Sorong, South Sorong Regency. This conducted from May July 2019 center industry. Variables measured study include fisheries, production data for 10 (ten) years, conditions availability, size, type obtained through interviews using questionnaires used obtain an overview stock nature. Analysis estimati...

Abstract State-space assessment models (SSMs) have garnered attention recently because of their ability to estimate time variation in biological and fisheries processes such as recruitment, natural mortality, catchability, selectivity. However, current SSMs cannot model time-varying growth internally nor accept length data, limiting use. Here, we expand the Woods Hole Assessment Model incorpora...

Bycatch studies have largely ignored population level effects on fish species of little commercial interest. Here we analyze bycatch of the lined seahorse (Hippocampus erectus) in the bait-shrimp trawl fishery in Hernando Beach, Florida, providing the first fisheries data for this species. Based on catch per unit of effort (CPUE), size, sex, and reproductive status of trawled H. erectus, 1) app...

IThere are many examples of how standardization of procedures in production and data collection have led to remarkable advances in industry and science, but standardization E is lacking regarding protocols for sampling fish populations in inland, freshwater sys4/ tems. Reasons given why biologists often resist standardized sampling protocols include X perceptions that differences in regions inv...

Harvesting of wild-living animals is often intensive and may selectively target heritable behavioral traits. We studied the exploitation dynamics and the vulnerability consequences of individual heterogeneity in movement-related behaviors in free-ranging pearly razorfish (Xyrichthys novacula). Using underwater-video recording, we firstly document a fast and high exploitation rate of about 60% o...

System perspective can be applied to the fishery management. Therefore investigation of sardine population behaviour dynamics by system dynamics methodology is presented in this paper. The model is based on Schaefer production model and available biological data was used for sardine in the Adriatic Sea. The Schaefer production model is often applied in order to submit behavior dynamics of fish ...