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Post by Gorilla king on Oct 8, 2023 10:11:32 GMT -5
Gorillas have 60.2% of white muscle fibers:
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Post by arctozilla on Oct 9, 2023 10:31:37 GMT -5
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Post by arctozilla on Oct 9, 2023 10:35:57 GMT -5
I also found a study stating that lions have great amount of white fibers in the locomotor muscles. www.ncbi.nlm.nih.gov/pmc/articles/PMC3587382/So it seems big cats have more fast twitch fibers in the locomotor muscles but bears have more fast twitch fibers in the upper body muscles. That would mean that big cats have less strength than bears because you can't have more speed and strength at the same time.
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Post by arctozilla on Oct 9, 2023 14:26:41 GMT -5
Am curious to know their weight because I found higher results on other specimen. www.researchgate.net/figure/Bite-force-and-bite-force-quotient-BFQ_tbl1_224630206The study above shows that... A 213 kg brown bear had a BFQ of 207. A 226 kg polar bear had a BFQ of 159. A 187 kg polar bear had a BFQ of 184. A 124 kg American black bear had a BFQ of 210. A 91 kg Asiatic black bear had a BFQ of 154. In contrast to Seems like something is changing.
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Post by arctozilla on Oct 9, 2023 14:30:38 GMT -5
Also didn't hyenas had higher bite force than wolves? What's up with the study?
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Post by Gorilla king on Oct 9, 2023 19:57:48 GMT -5
Reply #63:
Yeah, different studies give different results. The specimens used must be different.
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Post by arctozilla on Oct 10, 2023 1:53:34 GMT -5
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Post by arctozilla on Oct 12, 2023 11:11:40 GMT -5
Ops, I and @verdugo went wrong. I just found out they were talking about dorsi, not biceps. There are different groups of muscles.
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Post by oldindigosilverback on Oct 13, 2023 7:31:10 GMT -5
Reply 61 Enzyme‐ and immunohistochemical aspects of skeletal muscle fibers in brown bear (Ursus arctos)TLDRThe skeletal muscles of brown bear, one of the largest mammalian predators with an extraordinary locomotor capacity, were analyzed and the expression of only two fast isoforms in bear obviously meets the weight‐bearing and locomotor demands of these mammals.AbstractTo further elucidate the pattern of MHC isoform expression in skeletal muscles of large mammals, in this study the skeletal muscles of brown bear, one of the largest mammalian predators with an extraordinary locomotor capacity, were analyzed. Fiber types in longissimus dorsi, triceps brachii caput longum, and rectus femoris muscles were determined according to the myofibrillar ATPase (mATPase) histochemistry and MHC isoform expression, revealed by a set of antibodies specific to MHC isoforms. The oxidative (SDH) and glycolytic enzyme (α‐GPDH) capacity of fibers was demonstrated as well. By mATPase histochemistry five fiber types, i.e., I, IIC, IIA, IIAX, IIX were distinguished. Analyzing the MHC isoform expression, we assume that MHC‐I, ‐IIa, and ‐IIx are expressed in the muscles of adolescent bears. MHC‐I isoform was expressed in Type‐I fibers and coexpressed with presumably ‐IIa isoform, in Type‐IIC fibers. Surprisingly, two antibodies specific to rat MHC‐IIa stained those fast fibers, that were histochemically and immunohistochemically classified as Type IIX. This assumption was additionally confirmed by complete absence of fiber staining with antibody specific to rat MHC‐IIb and all fast fiber staining with antibody that according to our experience recognizes MHC‐IIa and ‐IIx of rat. Furthermore, quite high‐oxidative capacity of all fast fiber types and their weak glycolytic capacity also imply for MHC‐IIa and ‐IIx isoform expression in fast fibers of bear. However, in adult, full‐grown animal, only MHC‐I and MHC‐IIa isoforms were expressed. The expression of only two fast isoforms in bear, like in many other large mammals (humans, cat, dog, goat, cattle, and horse) obviously meets the weight‐bearing and locomotor demands of these mammals. J. Morphol., 2009. © 2008 Wiley‐Liss, Inc. www.semanticscholar.org/paper/Enzyme%E2%80%90-and-immunohistochemical-aspects-of-skeletal-Smerdu-Cehovin/16d1adaf520cf444d0fed3ed0d5f278231b63c8e
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Post by arctozilla on Oct 13, 2023 7:40:01 GMT -5
So they were talking about the muscle fibers in the locomotor muscles not in the upper body muscles.
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Post by oldindigosilverback on Oct 13, 2023 7:40:46 GMT -5
Reply 61. Not a surprise as swimming involves all muscles in the body.
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Post by arctozilla on Oct 13, 2023 7:48:02 GMT -5
Reply 71# can you share a link?
Inviato dal mio 21061119DG utilizzando Tapatalk
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Post by oldindigosilverback on Oct 15, 2023 22:42:27 GMT -5
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Post by Gorilla king on Oct 16, 2023 9:17:28 GMT -5
Reply #66:
Even Eastern gorillas are more aggressive than tigers according to this study, aggressiveness is an advantage often given to the tiger in these match-ups, looks like we will have to change that now, the tiger lost 1 advantage.
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Post by arctozilla on Oct 17, 2023 15:37:22 GMT -5
Yes tigers are overrated. Nowhere as aggressive as lions and leopards.
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