In the case of Atlantic mackerel there were no published data available, so a diameter of 185 [micro]m was used based on our observation of the smallest follicles containing cortical alveoli and a publication focusing on Atlantic mackerel fecundity determinacy (Greer-Walker et al.
Compared to unstained follicles the use of each stain to color European hake, Atlantic cod, Atlantic mackerel, and European plaice follicles increased the efficiency of image analysis measurement, particularly of semitransparent objects such as PVF, cortical alveoli, hydrated, and POFs.
Although the eosin solution stained both vitellogenic and hydrated follicles in European plaice, it was much less effective when applied to either Atlantic cod or Atlantic mackerel follicles.
European hake and Atlantic mackerel are examples where the vitellogenic follicle distribution is continuous extending down to overlap with the PVF population (Fig.
Thus, haddock landings had dropped by 1980 to about 22 percent of the maximum, dropped to about 94 percent, Atlantic herring to about 19 percent, Atlantic mackerel
to less than 1 percent, silver hake to about 5 percent, ocean perch to about 9 percent, alewives to about 3 percent, red hake to about 2 percent, and yellowtail flounder to about 29 percent.
We were not able to estimate convergent models for three species: Atlantic cod (fall), winter flounder (spring), and Atlantic mackerel (spring).
Common name Scientific name Type Winter skate Leucoraja ocellata Elasmobranch Little skate Leucoraja erinacea Elasmobranch Silver hake Merluccius bilinearis Groundfish Atlantic cod Gadus morhua Groundfish Haddock Melanogrammus aeglefinus Groundfish Winter flounder Pseudopleurenectes americanus Flatfish Yellowtail flounder Limanda ferruginea Flatfish Atlantic herring Clupea harengus Pelagic schooling fish Atlantic mackerel Scomber scombrus Pelagic schooling fish Table 2 ARIMA smoothing results for ln(x+l) transformed time series based on spring surveys.
The stock size and changes in the growth rate of the northwest Atlantic mackerel (Scomber scombrus L.
Density-dependent growth in the northwest Atlantic stock of Atlantic mackerel (Scomber scombrus).
Commercial catch records and trawl survey indices of abundance indicate that Atlantic herring (Clupea harengus) and Atlantic mackerel (Scomber scombrus) are the principal pelagic fish species for all these study areas (Clark and Brown, 1976; and NOAA, 1998).
Sand lance (Ammodytes ssp), squid, Atlantic herring, Atlantic mackerel, and bluefish (Pomatomus saltatrix) exceeded all other prey in terms of frequency of occurrence and accounted as a group for 88% of total stomach-contents biomass (Fig.
Atlantic mackerel were the third most common prey for this region (32% occurrence).
Atlantic herring, squid, spiny dogfish (Squalus acanthias), Atlantic mackerel, and bluefish tuna were secondary prey items, with frequencies of occurrence ranging from 9% to 14%.
Likewise, significant differences in these effects have been detected in other morphometric-based stock identification studies for marine fish species, such as Atlantic salmon (L'Abee-Lund, 1988), Atlantic mackerel
(Castonguay et al.