#ecotype

[notwiselybuttoowell]

‘No one knew they existed’: wild heirs of lost British honeybee found at Blenheim

The ‘ecotype’, thought to have been wiped out by disease and invasive species, is thriving in the estate’s ancient woodlands

[namu-the-orca]

Two additional illustrations made for my previous series on cetaceans in Nicaragua (part 1 and part 2). The client asked for these species after they too had been spotted in Nicaraguan waters, bringing the total number of cetacean species up to 18. Since these illustrations were done super quick (like the others) they are kinda rough. So I put them together and tried to make it a bit more interesting to look at.

Despite the quick painting, these are pretty cool whales. The killer whales here belong to the ETP, a very widespread ecotype of tropical killer whales. They’re often more brownish in colour and sometimes have a very faint or even completely absent saddle patch. Dwarf sperm whales have fake ‘gill markings’ - presumably to make them look more like sharks - and can secrete a dark liquid as a defence mechanism when frightened, just like squid. Fun fact: a killer whale has been seen hunting a dwarf sperm whale in The Bahamas.

[oaresearchpaper]

In order to set up a selection program for population of local animal based on their production, it is first necessary to gather appropriate documentation on their production and breeding performance. The aim of this study was to assess the relationships between live weight and various egg quality traits for the local hen’s ecotype in the Sahel and Centre-East (hen ecotype Konde) regions in Burkina Faso. Length, width, weight and external quality characteristics (shape and color) were assessed on a total of 240 eggs. Sixty-five and fifty five hen, each producing two eggs were used in the Sahel the Centre-East regions, respectively. Candling and densitometry techniques were used to detect fresh eggs. Egg internal quantitative and qualitative characteristics of internal egg quality were assessed by measuring yolk weight, albumin weight and yolk/white pH. The average egg weight ( 41, 89 ±3.98 vs. 32.67 ±3.22 g), shape index (75 ±0.04 vs. 72 ±0.014 %), egg length (47.87 ±2.4 vs. 46.16 ±2.64 mm), egg width (35.69 ±1.41 vs. 33.27 ±1.38 mm), white weight (21, 45 ± 1.71 vs. 14.23 ± 2.24 g), yolk weight (14.70 vs. 12.12 ± 3.22 g) and yolk dry matter percentage (49 ± 3 vs. 40 ± 8%) were significantly higher in eggs collected in the Centre-East Region (hen ecotype Konde), while white dry matter, yolk weight and respective yolk and white pH were similar across the two regions. Correlations between egg p weight (0.43), width (0.36) and length (0.46) were significant and low in Sahelian hens. However, the correlation (0.16) was not significant between egg weight and live weight in Konde ecotype. Correlation coefficients were slightly higher, in the Centre-East region, between egg weight and width (0.87), and egg length (0.66) in the Konde hen ecotype than in the Sahel one (0.84 and 0.61 respectively). Chicken ecotype Konde showed the highest correlations between yolk weight and egg width, length and weight, in contrast to Sahel hens. Yolk dry matter weight was negatively and significantly correlated with form index, egg width and egg weight in hen ecotype Konde, but was weakly, negatively and not significantly correlated with egg length.

[whaleposters]

Killer Whale ecotypes. Available at cetek.etsy.com

NOTE: The poster received a slight update on December 8, 2023! Including the following Orca ecotypes/variants: North Pacific Transient (Bigg

[blackandwhiteproductions]

[blackandwhiteproductions]

[mbimphblog]

A STUDY OF VARIATIONS IN THE E.R.R. AND OTHER REARING PERFORMANCES OF MUTANT STRAINS OF INDIAN TASAR SILKWORM | Asian Journal of Advances in Research

This study examines the relative differences in rearing performances as well as the effects of zonal differences on the productivity and quality of tasar cocoons of three mutant strains of the tasar silk worm, A. mylitta D. The findings show that the three mutant Tasar Silk Worm strains differ in their ability to nurture their young. Daba–blue has been proven to outperform Daba–yellow and Daba–almond in terms of rearing performance. Furthermore, zonal differences have an impact on the relative production and quality of tasar cocoons produced by mutant Antheraea mylitta D strains. The findings clearly reveal that the productivity and quality of tasar cocoons in the Jharkhand and Madhya Pradesh zones are far superior to those in the Orissa, West Bengal, and Bihar zones of the tasar producing states. Daba–blue has been found to outperform Daba–yellow and Daba–almond in terms of productivity and tasar cocoon quality. Because of the changes in their physio–genetic makeup, the results appear to be the result of genetic variability among the three mutant strains of A. mylitta D. The results show that, notwithstanding their differences, all three mutant strains of A. mylitta D. have established dominance over the control (Daba–green) in terms of breeding activity. As a result, the emergence of three unique mutant strains of tropical tasar silkworm is beneficial to tasar culture in general. Please see the link :- http://mbimph.com/index.php/AJOAIR/article/view/1611

[mbimphblog]

A STUDY OF VARIATIONS IN THE E.R.R. AND OTHER REARING PERFORMANCES OF MUTANT STRAINS OF INDIAN TASAR SILKWORM | Asian Journal of Advances in Research

This Research Article is an effort to study the relative variations in respect of rearing performances and to study the impacts of zonal differences on the productivity and qualities of tasar cocoons of three mutant strains viz; Daba–blue, Daba–yellow and Daba–almond of tasar silk worm, A. mylitta D. Results obtained are indicative of the fact that the three mutant strains of Tasar Silk Worm differ among themselves in respect of their rearing performances. The performances of Daba–blue in respect of rearing performances have been found evidently better than the Daba–yellow and Daba–almond. Further, zonal differences influence the relative performances of mutant strains of Antheraea mylitta D in respect of productivity and quality of tasar cocoons. The results have clearly shown that the productivity and quality of tasar cocoons of Jharkhand and Madhya Pradesh zones are relatively better and superior to Orissa, West Bengal and Bihar Zones of tasar producing states. The performances of Daba–blue in respect of productivity and qualities of tasar cocoons have been found evidently better than the Daba–yellow and Daba–almond. The results obtained appear to be the outcome of genetic variability among the three mutant strains of A. mylitta D. on account of relative differences in their physio–genetic makeup. Results obtained are indicative of the fact all the three mutant strains of A. mylitta D. in spite of relative differences have registered their supremacy over the control (Daba–green) on account of desired beneficial mutation in relation to their breeding activities. Thus the evolution of three distinct mutant strains of tropical tasar silkworm is in the larger interest of tasar culture. Please see the link :- https://mbimph.com/index.php/AJOAIR/article/view/1611