Spatiotemporal Variability of the Catch Composition and Discards Estimates of the Different Methods of Onboard Preservation for the Brazilian Sardine Fishery in the Southwest Atlantic Ocean

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Schroeder, R (Author) Other; Correia, AT (Author) ICBAS; Medeiros, SD (Author) Other; Pessatti, ML (Author) Other; Schwingel, PR (Author) Other

Journal

Title: Thalassas

Vol. 38

Pages: 573-597

ISSN: 0212-5919

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00W-38S

DOI: 10.1007/s41208-022-00398-5

Abstract (EN): A new method of fish preservation in refrigerated brine was implemented in 2008 for the Brazilian sardine purse seine fishery, in order to improve the fish quality available to the consumer compared to the traditional ice preserving method. This preservation method shifts increased the autonomy of the vessels, drastically changed the catch composition and had an impact on the non-target species. The effects of this new preservation method were evaluated from catch reports monitored by onboard scientific observers and from post-landing data using uni- and multivariate techniques. Discards assessment was also conducted in the canning industry based on the percentage of sardines without quality for the preparation of conserves, on other caught species than sardines, and on the proportion of individuals under the minimum size of capture. The hereby data was consistent with the previous historical datasets (2000-2013) of species composition. However, vessels using different methods of preservation showed significant differences regarding the records of non-target species, and catch volume of most aquatic taxa present in the refrigerated brine vessels was smaller. Moreover, information obtained from the canning industry recorded higher catches of Sardinella brasiliensis (target species), as well as large amounts of small sardines and sardines without quality for the preparation of the conserves, and other bycatch species. These findings were related to a great fishing power and autonomy of the modern refrigerated vessels that could explore fishing areas with distinct oceanographic features.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 25