Tomoki Kanna, Sayaka Takahashi, Eundeok Byun, Atsushi Yamashiro, Rui Matsumoto, Shinsuke Torisawa, and Yasushi Mitsunaga
Long-term quantitative observations are essential for the conservation of the whale shark (Rhincodon typus), which requires a long time to grow and mature. In this study, a data logger was attached to a mature male whale shark that had been maintained in captivity for over 29 years at the Okinawa Churaumi Aquarium in Japan. Because long-term rearing of whale sharks in captivity is desirable, the effects of water temperature and light on the swimming behavior of the captive whale shark were investigated. Read the article (PDF, 13 pages).
Jon Brodziak, Matthew Supernaw, Bai Li, Christine Stawitz, Haley Oleynik, and Teresa A’mar
Environmental and anthropogenic processes have led to widespread changes in productivities and spatial distributions of marine fishery resources. As geographic distributions of fish stocks and subsequently fishing fleets shift, improved spatiotemporal data and spatial modeling will become necessary to estimate abundance and productivity. The goal of this paper is to propose a strategy for engineering a modeling platform for spatially explicit, next-generation stock assessment models. Read the article (PDF, 17 pages).
Paul Geoghegan, Michael D. Murphy, Maureen Madray, M. Conor McManus, Eric Nestler, and Ann E. Pembroke
Ichthyoplankton samples were collected monthly at 2 stations in Massachusetts Bay from 2008 to 2012 and from 2015 to 2022 to characterize the larval fish assemblage for this area. The fauna was composed of 2 major assemblages that were 87% dissimilar from each other and associated with season and water temperature. A cold-water assemblage of low density (43.26 larvae/1000 m3) occurred from November through May at mean water column temperatures between 4.1°C and 10.3°C, with sand lances (Ammodytes spp.) the dominant taxon as a group. Read the article (PDF, 14 pages).
Ruairi MacNamara, Michael Shane, Victor Bach Muñoz, and Mark Drawbridge
White seabass (Atractoscion nobilis) are highly prized on the Pacific coast of North America. Size-based, seasonal, and spatial harvest regulations are in place for this species, leading to the release of live fish in hook-and-line fisheries. To better understand how releases may be affecting the population of this species in the Southern California Bight, 161 white seabass (420–1425 mm in total length [TL]) were captured by hook and line over a 4-year period (2021–2024). Read the article (PDF, 8 pages).
Kelli C. Mosca, Thomas F. Savoy, Jacqueline B. Roberts, Evan C. Ingram, Eric T. Schultz, and Hannes Baumann
Atlantic sturgeon (Acipenser oxyrinchus) seasonally aggregate in Long Island Sound and the Connecticut River, but their size and age structure and use of the river remain insufficiently understood. We analyzed all available length data from monitoring efforts (1988–2021: number of samples [n]=3544), estimated age from sections of pectoral-fin spines (n=296), and measured annuli widths for retrospective size-at-age analysis (n=166). Fish ranged in total length (TL) from 21 to 218 cm (mean: 105.2 cm), but 87% of them measured 50–130 cm TL. Read the article (PDF, 16 pages).
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