Revue canadienne de biologie最新文献_第4页

Photoperiod effects on carbohydrate metabolites in the goldfish, Carassius auratus: role of the pineal and retinal pathways. 光周期对鲫鱼碳水化合物代谢产物的影响:松果体和视网膜通路的作用。

Revue canadienne de biologie Pub Date : 1980-09-01

G Delahunty, J Olcese, V de Vlaming

{"title":"Photoperiod effects on carbohydrate metabolites in the goldfish, Carassius auratus: role of the pineal and retinal pathways.","authors":"G Delahunty, J Olcese, V de Vlaming","doi":"","DOIUrl":"","url":null,"abstract":"The effects of exposure to various photoregimes or to constant darkness on liver glycogen and plasma glucose levels in the goldfish were examined during different seasons. In addition, pinealectomized fish and optic nerve sectioned fish were exposed to the photoregimes to assess the potential role of the pineal organ and retinal pathways in mediating photoperiod effects. Neither photoperiod manipulation nor exposure to constant darkness affected liver glycogen levels in experiments conducted during October and January. Photoperiod alteration and exposure to constant darkness resulted in changes of liver glycogen and plasma glucose levels during May, suggesting that response to photoperiod varies with season. Likewise, optic nerve sectioning altered liver glycogen levels during May, but not during October or January, indicating that retinal pathways may be involved in mediating photoperiod effects. During both October and May pinealectomy resulted in a lowering of liver glycogen levels independent of photoregime ; the extent to which hepatic glycogen levels were decreased by pinealectomy was affected by lighting conditions. Plasma glucose levels were elevated in pinealectomized fish regardless of photoregime during May ; the degree of this increase varied with lighting conditions. Our data suggest that the pineal organ does not mediate photoperiod effects on plasma glucose and hepatic glycogen levels, but that there is a functional relationship between this organ and carbohydrate metabolism.","PeriodicalId":21345,"journal":{"name":"Revue canadienne de biologie","volume":"39 3","pages":"173-80"},"PeriodicalIF":0.0,"publicationDate":"1980-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18473431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimation of C3 levels in cerebrospinal fluid by electroimmunodiffusion. 电免疫扩散法测定脑脊液中C3水平。

Revue canadienne de biologie Pub Date : 1980-09-01

J E Bata, M Francoeur

引用次数: 0

Resistance of herpes channel catfish virus (HCCV) to temperature, pH, salinity and ultraviolet irradiation. 疱疹通道鲶鱼病毒(HCCV)对温度、pH、盐度和紫外线照射的抗性。

Revue canadienne de biologie Pub Date : 1980-09-01

J Robin, A Rodrigue

引用次数: 0

[Activities of twelve enzymes in the blood plasma of rainbow trout and tench subjected to various forms of thermal disturbance]. [在各种形式的热扰动下虹鳟鱼和鲱鱼血浆中12种酶的活性]。

Revue canadienne de biologie Pub Date : 1980-09-01

H Perrier, G Llaurens, C Perrier, G Pérès, J Gras

{"title":"[Activities of twelve enzymes in the blood plasma of rainbow trout and tench subjected to various forms of thermal disturbance].","authors":"H Perrier, G Llaurens, C Perrier, G Pérès, J Gras","doi":"","DOIUrl":"","url":null,"abstract":"The levels of ornithine carbamyl transferase, acid phosphatase, alkaline phosphatase, leucine amino peptidase, creatine kinase, amylase, glutamic oxalacetic transaminase, glutamic pyruvic transaminase, lactate deshydrogenase, hydroxybutyrate deshydrogenase, glutamate deshydrogenase and malate deshydrogenase were determined in the plasma of Rainbow Trout and Tench submitted to water temperature increases. In the Rainbow Trout a thermal shock from 12 to 21 degrees, increases activities of some enzymes while temperature increase up to pre-mortem stage causes very important changes in enzymatic levels. In the Tench a thermal shock from 12 to 28 degrees causes more changes of enzymatic activities than a shock from 12 to 25 degrees. In Tench acclimated to 25 degrees, various enzyme levels are increased in comparison with 12 degrees control animals. A high potassium level in water causes complex changes in enzyme levels. The most sensitive enzymes to thermal disturbance are GOT and GPt transaminases which increase whatever the aggression form, amylase when thermal disturbance is moderate, alkaline phosphatase and malate deshydrogenase in case of strong thermal stress. The study of these enzymes is recommended for watching the state of fishes living in artificially heated waters.","PeriodicalId":21345,"journal":{"name":"Revue canadienne de biologie","volume":"39 3","pages":"141-7"},"PeriodicalIF":0.0,"publicationDate":"1980-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17227933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Where is the spawning reflex receptor for neurohypophysial peptides in the killifish, Fundulus heteroclitus? 在鳉鱼中，神经垂体肽的产卵反射受体在哪里?

Revue canadienne de biologie Pub Date : 1980-06-01

G E Pickford, W R Knight, J N Knight

{"title":"Where is the spawning reflex receptor for neurohypophysial peptides in the killifish, Fundulus heteroclitus?","authors":"G E Pickford, W R Knight, J N Knight","doi":"","DOIUrl":"","url":null,"abstract":"Arginine vasotocin, injected into the third vehicle of 10 brain-cannulated, unanesthetized male Fundulus heteroclitus at estimated doses of 0.4 and 40 mU/g wt., failed to elicit a spawning reflex in five recipients; each had been both pre- and post-tested for responsiveness to intraperitoneal injections. Five others responded at the 40 mU/g dose and one also at the 0.4 mU/g dose: the first response occurred after a long delay, similar to that after intraperitoneal injection. Escape into the peripheral circulation is implicated. Since the N. preopticus is known to participate in the spawning reflex response, an indirect pathway from the peripheral AVT-receptor to the hypothalamic nucleus is suspected. Substances that might have behavioral effects, or function as neuro-transmitters, were tested with negative results: ACTH, epinephrine, norepinephrine, GABA, dopamine, L-dopa, cAMP, cGMP and the prostaglandins PGA2, PGE2 and PGE2 alpha. Serotonin failed to elicit a spawning reflex but caused rapidly developing symptoms of hypoxia. An immediate single spawning reflex was observed on three occasions after intracerebral injection: once after each of the otherwise ineffective hypothalamic releasing hormones, LRF and TRF, and once after AVP. Direct stimulation of the N. preopticus is suspected.","PeriodicalId":21345,"journal":{"name":"Revue canadienne de biologie","volume":"39 2","pages":"97-105"},"PeriodicalIF":0.0,"publicationDate":"1980-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17173986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cranial measurements in the Arctic fox (Alopex lagopus). 北极狐(Alopex lagopus)颅骨测量。

Revue canadienne de biologie Pub Date : 1980-06-01

A Bisaillon, L DeRoth

引用次数: 0

[Wilder Penfield 1891-1976]. [怀尔德·彭菲尔德1891-1976]。

Revue canadienne de biologie Pub Date : 1980-06-01

E Feuerwerker

引用次数: 0

Rodent incisor pulp, isolation and sectioning. 啮齿动物切牙牙髓，分离和切片。

Revue canadienne de biologie Pub Date : 1980-06-01

D D Pekovic, S Garzon, H Strykowski, V W Adamkiewicz