We aimed to develop alternative fishing gear for catching the common octopus, to decrease the use of bait and operating costs in comparison to commercial net pots. A tubular-type pot was designed, and behavioral responses of the common octopus were experimentally monitored in tank and replicated 10 times to compare fishing performances between 300 experimental and 300 commercial net pots in the...

We aimed to develop alternative fishing gear for catching the common octopus, to decrease the use of bait and operating costs in comparison to commercial net pots. A tubular-type pot was designed, and behavioral responses of the common octopus were experimentally monitored in tank and replicated 10 times to compare fishing performances between 300 experimental and 300 commercial net pots in the...

The efficiency of a pelagic longline fishing operation and the species composition of the resulting catch is influenced primarily by the relationship between the distribution of hooks and species vulnerability, with vulnerability described by either depth or some suite of environmental variables. We therefore fitted longline catch rate models to determine whether catch is estimated better by ve...

Blue crabs Callinectes sapidus (Rathbun, 1896) > 100 mm carapace width were sampled from a constructed oyster reef (1996 and 1997), a sand bar (1997) and a natural oyster bar (1997) in the piankatank River, Chesapeake Bay, USA to describe habitat use, sex ratios, and demographics across a gradient of habitat types. patterns of blue crab catch-per-unit-effort (CpUE), and demographics were simila...

This document introduces problems associated with shark catch data and CPUE indices using the Japanese longline fishery in the Atlantic as an example. A number of methods for addressing issues of under-reporting, short time series, and undifferentiated shark species are introduced including reporting rate filtering, comparison to observer datasets, covariate analysis, meta-analysis and tradebas...

We construct a catch per unit effort (CPUE) index for minke whales caught in the E-areas of north-eastern Atlantic, adjusted for boat efficiency and spatial effects. The index is interpreted as an unsmoothed relative index of abundance, also including variation in catch conditions due to weather, migration and local clustering of minke whales. Norwegian minke whaling was interrupted from 1984 t...

This study aimed to determine the catch composition and compare per unit effort (CPUE) of indigenous non-indigenous species in longline trammel net fisheries Mediterranean coasts Türkiye. The data were collected weekly from May 2020 September 2021 by commercial fishing vessels ( n = 62 days for nets, 75 longlines). results indicated that more than 90% consisted fishery Pterois miles (Bennett, 1...

The size of chum salmon juveniles is crucial to their survival. In order understand the population status and migration patterns juvenile in waters Amur River China, this study investigated resources basic biological characteristics Ussuri China. results showed that average catch per unit effort (CPUE) river margins was 0.140 ind·10−3 m3 for 0.255 River. Chum migrate downstream, mainly mid-May ...