In the Mediterranean Sea, catch of bottom trawl fisheries is composed a complex mix fish and invertebrates with considerable amount discards. Seasonal composition catches discards trawls operating at different depths in central Tyrrhenian Sea were investigated from October 2014 to 2015. The mean total per unit effort (CPUE) ranged between 30.93±8.43 27.52±9.88 kg/h shallow deep fishing grounds,...

The small-scale fisheries play a critical role in food security and income of coastal fishing communities. However, climate variability its impacts are affecting fishers, their communities, grounds. This study aimed to determine the perceived change vulnerability selected communities around Davao Gulf. A semi-structured questionnaire was used gather data on perceptions fishers ( N = 220) liveli...

I examined social and ecological influences on moose (Alces alces gigas) in Alaska, USA, with respect to hunting success, antler size, and population genetic structure. Catch per unit effort (CPUE) is frequently used to assess hunter success; thus I hypothesized that landscape characteristics and moose density would affect success. Using hunter harvest tickets returned to the Alaska Department ...

In the Philippines, very high fishing pressure coincides with the globally greatest number of shorefish species, yet no long-term fisheries data are available to explore species-level changes that may have occurred widely in the most species rich and vulnerable marine ecosystem, namely coral reefs. Through 2655 face-to-face interviews conducted between August 2012 and July 2014, we used fishers...

Reservoirs are important components of modern aquatic ecosystems that have negative impacts on native aquatic biota both upand downstream. We used a landscape-scale geographic information system (GIS) approach to quantify the spatial effects of 19 large reservoirs on upstream prairie fish assemblages at 219 sites in Kansas, USA. We hypothesized that fish assemblage structure would vary with inc...

Catch-per-unit-effort (CPUE) is often the main piece of information used in fisheries stock assessment; however, the catch and effort data that are traditionally compiled from commercial logbooks can be incomplete or unreliable due to many reasons. Pacific bluefin tuna (PBF) is a seasonal target species in the Taiwanese longline fishery. Since 2010, detailed catch information for each PBF has b...

Depredation is a human–wildlife interaction over access to resources, which often includes a combination of socio-economic, ecological and conservation issues. However, estimating the amount of resource depredated can be especially challenging when depredation occurs on fish in the marine environment. This is the case for killer whales (Orcinus orca) and sperm whales (Physeter macrocephalus) de...

OVERVIEW Eight years of octopus fishery records from southwest Madagascar reveal significant positive impacts from 36 periodic closures on: (a) fishery catches and (b) village fishery income, such that (c) economic benefits from increased landings outweigh costs of foregone catch. Closures covered ~20% of a village's fished area and lasted 2-7 months. FISHERY CATCHES FROM EACH CLOSED SITE Oct...

Research on regulatory mechanisms in biological populations often focuses on environmental covariates. An integrated approach that combines environmental indices with organismal-level information can provide additional insight on regulatory mechanisms. Survival of spring/summer Snake River Chinook salmon (Oncorhynchus tshawytscha) is consistently low whereas some adjacent populations with simil...

The debate on whether artificial reefs produce new fish or simply attract existing fish biomass continues due to the difficulty in distinguishing these processes, and there remains considerable doubt as to whether artificial reefs are a harmful form of habitat modification. The harm typically associated with attraction is that fish will be easier to harvest due to the existing biomass aggregati...