Unanswered Forum Topics

Concurrent bycatch and population assessments of Burmeister’s porpoises in northern Peru reveal unsustainable levels of mortality

Submitted by allykristan on

The authors performed onboard surveys (line transects and passive acoustic monitoring) and interviewed gillnet fishers to assess abundance and bycatch of the endemic Burmeister’s porpoises (Phocoena spinipinnis) in northern Peru in 2023. The population abundance in the study area was estimated at 1,696 spatially distributed individuals, with the highest densities found within 25km of shore and within shallow waters ≤50 m. Fishers' descriptions of bycatch aligned with survey results, and most fishers reported experiencing porpoise bycatch the previous year.

Read More

Concurrent bycatch and population assessments of Burmeister’s porpoises in northern Peru reveal unsustainable levels of mortality

Submitted by allykristan on

The authors performed onboard surveys (line transects and passive acoustic monitoring) and interviewed gillnet fishers to assess abundance and bycatch of the endemic Burmeister’s porpoises (Phocoena spinipinnis) in northern Peru in 2023. The population abundance in the study area was estimated at 1,696 spatially distributed individuals, with the highest densities found within 25km of shore and within shallow waters ≤50 m. Fishers' descriptions of bycatch aligned with survey results, and most fishers reported experiencing porpoise bycatch the previous year.

Read More

Concurrent bycatch and population assessments of Burmeister’s porpoises in northern Peru reveal unsustainable levels of mortality

Submitted by allykristan on

The authors performed onboard surveys (line transects and passive acoustic monitoring) and interviewed gillnet fishers to assess abundance and bycatch of the endemic Burmeister’s porpoises (Phocoena spinipinnis) in northern Peru in 2023. The population abundance in the study area was estimated at 1,696 spatially distributed individuals, with the highest densities found within 25km of shore and within shallow waters ≤50 m. Fishers' descriptions of bycatch aligned with survey results, and most fishers reported experiencing porpoise bycatch the previous year.

Read More

Concurrent bycatch and population assessments of Burmeister’s porpoises in northern Peru reveal unsustainable levels of mortality

Submitted by allykristan on

The authors performed onboard surveys (line transects and passive acoustic monitoring) and interviewed gillnet fishers to assess abundance and bycatch of the endemic Burmeister’s porpoises (Phocoena spinipinnis) in northern Peru in 2023. The population abundance in the study area was estimated at 1,696 spatially distributed individuals, with the highest densities found within 25km of shore and within shallow waters ≤50 m. Fishers' descriptions of bycatch aligned with survey results, and most fishers reported experiencing porpoise bycatch the previous year.

Read More

Concurrent bycatch and population assessments of Burmeister’s porpoises in northern Peru reveal unsustainable levels of mortality

Submitted by allykristan on

The authors performed onboard surveys (line transects and passive acoustic monitoring) and interviewed gillnet fishers to assess abundance and bycatch of the endemic Burmeister’s porpoises (Phocoena spinipinnis) in northern Peru in 2023. The population abundance in the study area was estimated at 1,696 spatially distributed individuals, with the highest densities found within 25km of shore and within shallow waters ≤50 m. Fishers' descriptions of bycatch aligned with survey results, and most fishers reported experiencing porpoise bycatch the previous year.

Read More

Concurrent bycatch and population assessments of Burmeister’s porpoises in northern Peru reveal unsustainable levels of mortality

Submitted by allykristan on

The authors performed onboard surveys (line transects and passive acoustic monitoring) and interviewed gillnet fishers to assess abundance and bycatch of the endemic Burmeister’s porpoises (Phocoena spinipinnis) in northern Peru in 2023. The population abundance in the study area was estimated at 1,696 spatially distributed individuals, with the highest densities found within 25km of shore and within shallow waters ≤50 m. Fishers' descriptions of bycatch aligned with survey results, and most fishers reported experiencing porpoise bycatch the previous year.

Read More

Bycatch in the balance: the trawl fisheries impact on South American sea lions in San Matias Gulf, with comments on other species

Submitted by allykristan on

The authors used onboard observers and fishing records to evaluate marine mammal bycatch in trawl fisheries of the San Matías Gulf, Argentina. Results show that, of 46 incidentally caught species, the American sea lion (Otaria byronia) was caught most frequently, and that catch was associated with proximity to colonies and the target species identity. Significantly higher bycatch rates were observed in the hake fleet.

 

Read More

Bycatch in the balance: the trawl fisheries impact on South American sea lions in San Matias Gulf, with comments on other species

Submitted by allykristan on

The authors used onboard observers and fishing records to evaluate marine mammal bycatch in trawl fisheries of the San Matías Gulf, Argentina. Results show that, of 46 incidentally caught species, the American sea lion (Otaria byronia) was caught most frequently, and that catch was associated with proximity to colonies and the target species identity. Significantly higher bycatch rates were observed in the hake fleet.

 

Read More

Bycatch in the balance: the trawl fisheries impact on South American sea lions in San Matias Gulf, with comments on other species

Submitted by allykristan on

The authors used onboard observers and fishing records to evaluate marine mammal bycatch in trawl fisheries of the San Matías Gulf, Argentina. Results show that, of 46 incidentally caught species, the American sea lion (Otaria byronia) was caught most frequently, and that catch was associated with proximity to colonies and the target species identity. Significantly higher bycatch rates were observed in the hake fleet.

 

Read More

Bycatch in the balance: the trawl fisheries impact on South American sea lions in San Matias Gulf, with comments on other species

Submitted by allykristan on

The authors used onboard observers and fishing records to evaluate marine mammal bycatch in trawl fisheries of the San Matías Gulf, Argentina. Results show that, of 46 incidentally caught species, the American sea lion (Otaria byronia) was caught most frequently, and that catch was associated with proximity to colonies and the target species identity. Significantly higher bycatch rates were observed in the hake fleet.

 

Read More

Bycatch in the balance: the trawl fisheries impact on South American sea lions in San Matias Gulf, with comments on other species

Submitted by allykristan on

The authors used onboard observers and fishing records to evaluate marine mammal bycatch in trawl fisheries of the San Matías Gulf, Argentina. Results show that, of 46 incidentally caught species, the American sea lion (Otaria byronia) was caught most frequently, and that catch was associated with proximity to colonies and the target species identity. Significantly higher bycatch rates were observed in the hake fleet.

 

Read More

Bycatch in the balance: the trawl fisheries impact on South American sea lions in San Matias Gulf, with comments on other species

Submitted by allykristan on

The authors used onboard observers and fishing records to evaluate marine mammal bycatch in trawl fisheries of the San Matías Gulf, Argentina. Results show that, of 46 incidentally caught species, the American sea lion (Otaria byronia) was caught most frequently, and that catch was associated with proximity to colonies and the target species identity. Significantly higher bycatch rates were observed in the hake fleet.

 

Read More

Bycatch in the balance: the trawl fisheries impact on South American sea lions in San Matias Gulf, with comments on other species

Submitted by allykristan on

The authors used onboard observers and fishing records to evaluate marine mammal bycatch in trawl fisheries of the San Matías Gulf, Argentina. Results show that, of 46 incidentally caught species, the American sea lion (Otaria byronia) was caught most frequently, and that catch was associated with proximity to colonies and the target species identity. Significantly higher bycatch rates were observed in the hake fleet.

 

Read More

Factors associated with bycatch of marine mammals in United Kingdom static net fisheries

Submitted by allykristan on

The authors evaluated factors influencing marine mammal bycatch in static net fishing operations in the UK between 1996 and 2023. Since 2014, harbour porpoise (Phocoena phocoena)  bycatch has been decreasing while common dolphin (Delphinus delphis) bycatch has been increasing; grey seal (Halichoerus grypus) and harbour seal  (Phoca vitulina) bycatch has been increasing gradually across the time period. Influential factors included seasonal patterns, water depth, and level of fishing effort. 

 

 

Read More

Factors associated with bycatch of marine mammals in United Kingdom static net fisheries

Submitted by allykristan on

The authors evaluated factors influencing marine mammal bycatch in static net fishing operations in the UK between 1996 and 2023. Since 2014, harbour porpoise (Phocoena phocoena)  bycatch has been decreasing while common dolphin (Delphinus delphis) bycatch has been increasing; grey seal (Halichoerus grypus) and harbour seal  (Phoca vitulina) bycatch has been increasing gradually across the time period. Influential factors included seasonal patterns, water depth, and level of fishing effort. 

 

 

Read More

Factors associated with bycatch of marine mammals in United Kingdom static net fisheries

Submitted by allykristan on

The authors evaluated factors influencing marine mammal bycatch in static net fishing operations in the UK between 1996 and 2023. Since 2014, harbour porpoise (Phocoena phocoena)  bycatch has been decreasing while common dolphin (Delphinus delphis) bycatch has been increasing; grey seal (Halichoerus grypus) and harbour seal  (Phoca vitulina) bycatch has been increasing gradually across the time period. Influential factors included seasonal patterns, water depth, and level of fishing effort. 

 

 

Read More

Factors associated with bycatch of marine mammals in United Kingdom static net fisheries

Submitted by allykristan on

The authors evaluated factors influencing marine mammal bycatch in static net fishing operations in the UK between 1996 and 2023. Since 2014, harbour porpoise (Phocoena phocoena)  bycatch has been decreasing while common dolphin (Delphinus delphis) bycatch has been increasing; grey seal (Halichoerus grypus) and harbour seal  (Phoca vitulina) bycatch has been increasing gradually across the time period. Influential factors included seasonal patterns, water depth, and level of fishing effort. 

 

 

Read More

Factors associated with bycatch of marine mammals in United Kingdom static net fisheries

Submitted by allykristan on

The authors evaluated factors influencing marine mammal bycatch in static net fishing operations in the UK between 1996 and 2023. Since 2014, harbour porpoise (Phocoena phocoena)  bycatch has been decreasing while common dolphin (Delphinus delphis) bycatch has been increasing; grey seal (Halichoerus grypus) and harbour seal  (Phoca vitulina) bycatch has been increasing gradually across the time period. Influential factors included seasonal patterns, water depth, and level of fishing effort. 

 

 

Read More