Sexual Dimorphism in Vertebral Number in the Capelin Mallotus villosus (Muller)

1937 ◽  
Vol 3 (5) ◽  
pp. 417-420
Author(s):  
John Lawson Hart
Keyword(s):  
Sexual Dimorphism ◽  
Sexual Difference ◽  
Vancouver Island ◽  
Mallotus Villosus ◽  
Vertebral Number ◽  
Sexual Specialization ◽  
Capelin Mallotus Villosus ◽  
High Degree

Vertebral counts of capelin spawning in autumn on Vancouver Island were: males 65.65, females 65.13. Differing significantly, these demonstrate sexual dimorphism of a type rare among fishes. The sexual difference is not primarily associated with length, although there is some relationship between length and vertebral number among females. The high degree of sexual specialization in the fins is limited to size and integument and does not include meristic features.

Social Reform in America

2017 ◽  
Author(s):  
Luke E. Harlow
Keyword(s):  
Sexual Difference ◽  
Salvation Army ◽  
Single Woman ◽  
Religious Dissent ◽  
Public And Private ◽  
Separate Spheres ◽  
The Public ◽  
Religious Revivals ◽  
Anglophone World ◽  
High Degree

Any discussion of nineteenth-century religious Dissent must look carefully at gender. Although distinct from one another in important respects, Nonconformist congregations were patterned on the household as the first unit of God-given society, a model which fostered questions about the relationship between male and female. Ideas of gender coalesced with theology and praxis to shape expectations central to the cultural ethos of Nonconformity. Existing historiographical interpretations of gender and religion that use the separate spheres model have argued that evangelical piety was identified with women who were carefully separated from the world, while men needed to be reclaimed for religion. Despite their virtues, these interpretations suppose that evangelicalism was a hegemonic movement about which it is possible to generalize. Yet the unique history and structures of Nonconformity ensured a high degree of particularity. Gender styles were subtly interpreted and negotiated in Dissenting culture over and against the perceived practices and norms of the mainstream, creating what one Methodist called a ‘whole sub-society’ differentiated from worldly patterns in the culture at large. Dissenting men, for instance, deliberately sought to effect coherence between public and private arenas and took inspiration from the published lives of ‘businessmen “saints”’. Feminine piety in Dissent likewise rested on integration, not separation, with women credited with forming godly communities. The insistence on inherent spiritual equality was important to Dissenters and was imaged most clearly in marriage, which transcended the public/private divide and supplied a model for domestic and foreign mission. Missionary work also allowed for the valorization and mobilization of distinctive feminine and masculine types, such as the single woman missionary who bore ‘spiritual offspring’ and the manly adventurer. Over the century, religious revivals in Dissent might shift these patterns somewhat: female roles were notably renegotiated in the Salvation Army, while Holiness revivals stimulated demands for female preaching and women’s religious writing, making bestsellers of writers such as Hannah Whitall Smith. Thus Dissent was characterized throughout the Anglophone world by an emphasis on spiritual equality combined with a sharpened perception of sexual difference, albeit one which was subject to dynamic reformulation throughout the century.

scholarly journals Early life growth is affecting timing of spawning in the semelparous Barents Sea capelin (Mallotus villosus)

2021 ◽  
pp. 102614
Author(s):  
Florian Berg ◽  
Samina Shirajee ◽  
Arild Folkvord ◽  
Jane Aanestad Godiksen ◽  
Georg Skaret ◽  
...  
Keyword(s):  
Early Life ◽  
Barents Sea ◽  
Mallotus Villosus ◽  
Capelin Mallotus Villosus ◽  
Timing Of Spawning

Channel head dynamics: capelin (Mallotus villosus) aggregation in the tidally driven upwelling system of the Saguenay - St. Lawrence Marine Park's whale feeding ground

2002 ◽  
Vol 59 (2) ◽  
pp. 197-210 ◽  
Author(s):  
Yvan Simard ◽  
Diane Lavoie ◽  
François J Saucier
Keyword(s):  
Circulation Model ◽  
Feeding Strategies ◽  
Total Biomass ◽  
Balaenoptera Acutorostrata ◽  
Mallotus Villosus ◽  
Tidal Dynamics ◽  
Lawrence Estuary ◽  
Fin Whale ◽  
Capelin Mallotus Villosus ◽  
Tidally Driven

Capelin (Mallotus villosus) tridimensional distribution at the head of the Laurentian Channel in the St. Lawrence estuary was investigated using 38- and 120-kHz acoustic surveys in the summers of 1994, 1995, 1997, and 1998. The results are interpreted with the help of a high-resolution tridimensional tidal circulation model. Total biomasses were small (93–4583 t) and showed rapid fluctuations, whereas mesoscale distribution was more constant. Capelin tended to occupy the very end of the channel head, especially the slopes and shallows surrounding the basins. This pattern did not coincide with the krill distribution, but the two total biomass series were significantly correlated. Capelin tidal dynamics is characterized by herding of capelin against the channel head slopes by the starting flooding currents, followed by an upwelling over the sills and shallows during maximum flood currents, and a return to the channel by the surface outflow during ebb. Each side of the channel head has a distinct capelin retention tidal cycle involving passive advection, swimming, and the two-layer estuarine circulation. This capelin distribution and tidal dynamics closely match the local fin whale (Balaenoptera physalus) and minke whale (Balaenoptera acutorostrata) distributions observed from the whale-watching fleet and typical tidal feeding strategies at the channel head.

Effect of Double Freezing and Subsequent Long-Term Refrozen Storage at −23 °C on the Quality of Inshore Male Capelin (Mallotus villosus)

1978 ◽  
Vol 35 (4) ◽  
pp. 452-456 ◽  
Author(s):  
J. R. Botta ◽  
D. H. Shaw
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Peroxide Value ◽  
Storage Time ◽  
Mallotus Villosus ◽  
Protein Nitrogen ◽  
Capelin Mallotus Villosus ◽  
Extractable Protein

Whole inshore male capelin (Mallotus villosus) were stored at −23 °C for 2 mo (C2), or 6 mo (C6) prior to thawing, beheading and eviscerating, and refreezing. Though the quality of the twice-frozen product was in both cases inferior to a once-frozen sample, it was still quite acceptable after 2 yr of refrozen storage. As expected, quality was superior in the C2 samples, but in both sets of samples taste deteriorated to a greater extent than texture. Chemical measurement of peroxide value indicated a possible development of rancidity that could not be detected by sensory analysis. Considerable lipid hydrolysis occurred, with the free fatty acids (FFA) at least doubling during storage; increases were greater in C6. In both experiments FFA production correlated with texture, taste, and with extractable protein nitrogen (EPN). Dimethylamine (DMA), trimethylamine (TMA), hypoxanthine, and EPN appeared to be good indicators of storage time and sensory quality. Key words: capelin, dimethylamine (DMA), extractable protein nitrogen (EPN), free fatty acids (FFA), hypoxanthine, peroxide value, refrozen storage, taste, texture, trimethylamine

Sign in / Sign up

Export Citation Format

Share Document