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Ocean Warming Effects on Catch and Revenue Composition in the Northwestern Mediterranean Sea
Climate change‐induced ocean warming can have profound implications for marine ecosystems and the socioeconomic activities dependent on them, affecting the catch composition, and fisheries revenue. Our study evaluates spatio‐temporal changes in the Northwestern Mediterranean marine fisheries catch and revenue composition tied to ocean warming and disentangles the different underlying processes. To do so, we analyzed the weighted mean thermal affinity of the catch (Mean Temperature of the Catch: MTC) and revenue (Mean Temperature of Revenue: MTR) across different taxonomic groups, fishing fleets, and fishing harbors, using a 23‐year time series of commercial landings. Results revealed changes in catch and revenue composition, with an overall temporal increase in the MTC (0.68°C per decade) and MTR (0.58°C per decade) linked to local sea temperature. The temporal increase in both indices prevailed across fishing fleets and taxonomic groups. The processes underpinning these changes over time were tropicalization (i.e. relative increase of warm‐affinity species; 41.97% for MTC and 45.20% for MTR), and deborealization (i.e. relative decrease of cold‐affinity species; 46.58% for MTC and 44.99% for MTR), with variability across dimensions. Deborealization particularly influenced pelagic fisheries (i.e. purse‐seiners and surface longliners) and some commercially important species (e.g. European hake, blue whiting, and Norway lobster). Even if the temporal increase in MTC and MTR was consistent across taxonomic groups and fleets, the spatial dimension showed heterogeneity and temporal declines in some cases. In summary, our study provides valuable information about temporal changes in catch composition associated with local ocean warming and reveals potential cascading effects through the social‐ecological system. In particular, we presented the MTR approach for the first time, evidencing ocean warming effects on revenue composition. We suggest that the correlation between changes in catch and revenue composition reveals the adaptive capacity, or fragility of specific fishing fleets and points to management priorities.
Louisiana Catch: A Novel
A grieving daughter and abuse survivor must summon the courage to run a feminist conference, trust a man she meets over the Internet, and escape a catfishing stalker to find her power. Ahana, a wealthy thirty-three-year-old New Delhi woman, flees the pain of her mother's death, and her dark past, by accepting a huge project in New Orleans, where she'll coordinate an annual conference to raise awareness of violence against women. Her half-Indian, half-Irish colleague and public relations guru, Rohan Brady, who helps Ahana develop her online presence, offends her prim sensibilities with his raunchy humor. She is convinced that he's a womanizer. Meanwhile, she seeks relief from her pain in an online support group, where she makes a good friend: the mercurial Jay Dubois, who is also grieving the loss of his mother. Louisiana Catch is an emotionally immersive novel about identity, shame, and who we project ourselves to be in the world. It's a book about Ahana's unreliable instincts and her ongoing battle to deter-mine whom to place her trust in as she, Rohan, and Jay shed layers of their identities.'Louisiana Catch is a triumph. In Ahana, Sweta Vikram has created an unforgettable character, strong, wise, and deeply human, who'll inspire a new generation struggling to come to terms with their identity in a world of blurring identities.'--KARAN BAJAJ, New York Times bestselling author, The Yoga of Max's Discontent'In Louisiana Catch, Sweta Vikram brings life to the complex human rights issue of violence against women. Through one woman's journey to make sense of her past and ultimately heal, Vikram shows us that yoga can reconnect us to ourselves, and that by empowering others, we transform our own lives.'--ZOE LEPAGE, Founder, Exhale to Inhale'Louisiana Catch perfectly captures what it means to be human in a digital world, where support groups meet online, love interests flirt on Twitter, and people get confused with personas. Equal parts tender and playful, moving and hopeful, Vikram's prose connects us with timeless truths about grief and redemption in a satisfyingly modern way.'--STEPHANIE PATERIK, Managing Editor, Adweek Learn more at www.SwetaVikram.com From Modern History Press, www.ModernHistoryPress.com
Decline in glass eel catch and by-catch and changes in species composition in the River Minho estuary compared to 40 years ago
The glass eel fishing by-catch in the Minho River was evaluated by assessing its composition during the 2021–2022 fishing season and comparing results with the first data collected during the 1981-1982 season. Results showed that by-catch composition was mainly dominated by fish and crustaceans. Large reductions in glass eel and by-catch yields were observed, with decreases in both fish and invertebrate yields. The largest reductions were recorded for Anguilla anguilla (yellow eel), Atherina boyeri, Saduriella losadai and Palaemon longirostris. On the other hand, a few species showed an increase in both number of catches and yield, such as Crangon crangon and Gammarus spp. Decreases in glass eel and by-catch yields were less pronounced upstream. By-catch is mainly composed of estuarine species, with higher catches of marine species downstream. Most of the marine invertebrate species caught were correlated with the presence of marine red, green and brown algae. Small fish and juveniles of larger species were most commonly caught, with the most common species being Atherina boyeri, Pomatoschistus microps, Syngnathus abaster and Ammodytes tobianus. Similarly, invertebrate species such as Crangon crangon, Eurydice pulchra, Lekanesphaera rugicauda and Gastrosaccus spinifer were also important in the composition of the by-catch. High levels of marine fish stragglers and marine invertebrates associated with marine algae were also observed, in contrast to data collected in the 1980s, suggesting a possible shift in the composition of the lower estuarine fauna over the past 40 years.
The influence of fishing methods on catch size, catch rate, and size distribution of Octopus cyanea (Gray, 1849) in Zanzibar, Tanzania
Octopus cyanea (Gray, 1849) is a benthic and diurnally active species found in tropical and subtropical reefs. It is harvested for commercial and subsistence purposes, but some factors in Zanzibar challenge its catch. This study was conducted to determine variations in O. cyanea catch between on-foot and dive fishing methods in Zanzibar. Information from this study would help in the establishment of management plans, which are still challenging in Zanzibar. The catch size, catch rate, and individual size of octopuses from dive and on-foot fishing were determined. Results revealed that about 54.11 % of all octopuses were caught by on-foot fishing and 45.89 % by dive fishing. However, the average catch size (by weight and length) was lower for on-foot fishing than for dive fishing. Moreover, the catch size and catch rate per fisher were higher for dive fishers than for on-foot fishers. The proportion of octopuses weighing ≥ 1000 g constitutes 49 % and 26 % of the total catch by dive and on-foot fishing, respectively, indicating that dive fishing captures a significantly higher percentage of larger individuals than on-foot fishing. Therefore, the concentrated on-foot fishing in shallow water could affect more recruits and juveniles, while high fishing efforts in deep water by dive fishers could impact more spawners and brooders found in these areas. Given these observations, this study emphasizes the necessity of conducting long-term research to accurately identify the peak breeding, spawning, and recruitment seasons.