English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Total mortality (Z, year(-1)) of southern North Sea brown shrimp (Crangon crangon) was determined as Z = theta K, based on the von Bertalanffy length-growth constant (K, year(-1)) and theta derived from length-based methods. Mortality estimates were based on length frequency distributions obtained from four long-term dataseries (1955-2006): German Demersal Young Fish Survey, Dutch Demersal Fish Survey, and two German Bycatch series (Busum and East Frisia). Four methods to estimate theta and L(infinity). were evaluated. Highest total mortality (Z = 8 year(-1)) was estimated for the early 1990s, and the lowest (Z = 4 year(-1)) for the 1960s. Accounting for these differences, a median Z rather than mean values was calculated for the whole series, and the value ranged from 5.74 (Ssentongo and Larkin method), through 5.65 (Beverton and Holt method) and 5.64 (Jones and Zalinge method), to 5.35 (length-converted catch curves). Over the whole period, an increase in theta and a decrease in the proportion of shrimps >60 mm in the catch was observed, whereas asymptotic length L(infinity) remained constant (at 79.3 mm total length)

Estimating total mortality and asymptotic length of Crangon crangon between 1955 and 2006