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The use of analysis of penguin stomach contents in simultaneous study of prey and predator parameters
-.. "'" .' .'"."."." " ....... "--.... '" .. " .. " ............ " . --. " .. ""." .......... " ... "." ..... " .... -.. " .. --." .. --............... ' ... " ---......... " ............. " ..... -.. " .. ,,' ...... . .._ ...... o IL-______________ L-______________ ~ ______________ J-______________ ~ o 10 20 30 40 dec 13 ... season). Sampling of krill introduces the problem of net selectivity which, together with krill swarming ... studies, all krill taken from stomachs of a particular group of penguins were pooled together in order to ... -.............. _ .... " ................ " .... " .... " .......... " .... " .......... " ......... -......... " ................ " .... " ............... " .... " ................... " .... -........... " .... ~ .... -........... --............ " ..................... " .......... " ......... . . -.-.•• ~ ..••.••.•...••.• H._ ••..••• ~ ••••..•.•• a ...... ~.~ ••.... 30 1 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 367–375 : Autor(es): Marschoff, E. and B. González
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Analyses of acoustic line-transect data from the waters around South Georgia: estimation of krill (Euphausia superba Dana) – biomass
WG-KRILL-91/30 ANALYSES OF ACOUSTIC LINE-TRANSECT DATA ... sections approximately 30 n miles in length. Each section was further divided into 1 n mile integration ... estimates obtained for the region in other years. The above analyses have highlighted that the various ... set of three half transects were grouped together on the basis of geographic region (Figure 5). 6 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 225–243 : Autor(es): Murphy, E., I. Everson and A. Murray
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Histological study on the ovarian development of mackerel icefish (Champsocephalus gunnari) from the South Georgia Islands
individuals (45%) was found, together with a relatively low occurrence of females that spawned or were in ... proportion of juvenile individuals (45%) was found, together with a relatively low occurrence of females ... important species of interest to CCAMLR. Together with other biological and oceanographic information ... recorded. The length and weight ranges were 16 to 49 cm and 20 to 1 050 g respectively. The age groups of ... the specimens ranged from two to five years, estimated from the age/length key presented in Barrera ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 35–49 : Autor(es): Macchi, G.J. and E.R. Barrera-Oro
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Joinville–D’Urville Islands (Subarea 48.1) – a former fishing ground for the spiny icefish (Chaenodraco wilsoni), at the tip of the Antarctic Peninsula – revisited
two concentrations of C. wilsoni at 62°20’–62°30’S 55°30’–56°00’W in the northern part of the shelf ... . Ikthiol., 20 (4): 644–655. Translated as J. Ichthyol., 20 (4): 50–60. -63° 0' -62°30' -62° 0' -61°30 ... – D’Urville Islands in January 1978 to May 1979. 0 5 10 15 20 25 30 0 5 10 15 20 25 30 35 Length ... . 14 0 5 10 15 20 25 0 5 10 15 20 25 30 35 40 Length (cm) Fr eq ue nc y ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 1–20 : Autor(es): Kock, K.-H., L. Pshenichnov, C.D. Jones, K. Shust, K.E. Skora and Zh.A. Frolkina
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Estimates of fish stock biomass around South Georgia in January/February 1985
reduction in stock size to 10 – 20% of that estimated before the onset of heavy fishing. In C. gunnari the ... fishery is dependant on the abundance of the recruiting year class. Conservation measures adopted by ... were seen domi na ted by 3 years old. fish (age class II) which is presumably the recruit i ng year ... in stock size to 10 ~ 20% of that estimated before the onset of heavy fishing. In C. gunnari the ... et C. gunnari. Les estimations de biomasse indiquent une reduction de 10-20% du stock - 2 ... ITPOMhlCna. oueHKH 6HOMaCChl yKa3hlBaWT Ha CHH~eHHe pa3Mepa 3anacoB no 10-20% rrpennonara- eMOH BenHqHHhl no ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 1-32 : Autor(es): Kock, K.-H.
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Length- and age-at-spawning of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea
region is 16.6 years (95% CI 16.0–17.3) or 133.2 cm (95% CI 130.9–135.7) by length. On average, males ... spawn at a younger age with an A 50% of 12.8 years (95% CI 11.9–14.0) or 120.4 cm (95% CI 114.8–126.7 ... stage for at least one year. Individual oocytes are then recruited into the vitellogenic phase over at ... maturation stage by approximately May each year. The age at 50% spawning for females on the Ross Sea slope ... Age (years) 0 10 20 30 ... f fi sh Age (years) 5 10 15 20 25 30 ... histograms. Diameter (um) Fr eq ue nc y 0 500 1000 1500 2000 2500 0 10 0 20 0 30 0 40 0 n= 28 ... L50% for the hindcast ogive. 0 10 20 30 40 0. 0 0. 2 0. 4 0. 6 0. 8 1. 0 Age (y) P ro po rti ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 53–73 : Autor(es): Parker, S.J. and P.J. Grimes
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The use of predator-derived krill length-frequency distributions to calculate krill target strength
to be independent to avoid interrelated estimates. For South Georgia, there is a 20-year time ... Pchantillons simultal~es des predateurs et des filets n'affichent qu'une difference de l%, ce qui met en ... 0.9% (1994) to 6.4% (1996) and is shown for all years in Table 1. There was a significant ... results in a survey variance of 20% (Brierley et al., 1999). By integrating data from land-based ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 155–163 : Autor(es): Reid, K. and A.S. Brierley
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Age estimation and maturity of the ridge-scaled macrourid (Macrourus whitsoni) from the Ross Sea
mean total length-at-maturity (38.8 and 46.4 cm) and mean age-at-maturity (10.6 and 13.6 years) are ... work on this species. Von Bertalanffy growth models assuming different growth by sex and by year-within ... and 30 years old in the second reading. Males Females 0 10 20 30 ... standard normal distribution R es id ua ls (b) 20 30 40 50 60 70 80 -2 -1 0 1 2 Fitted values R ... 0 1 2 3 20 30 40 50 60 70 80 Fitted ... R es id ua ls (b) 20 30 40 50 60 70 80 -2 -1 0 1 2 Fitted values R es id ua ls -3 -2 -1 ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 291–303 : Autor(es): Marriott, P.M., M.J. Manning and P.L. Horn
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Distribution of mackerel icefish (Champsocephalus gunnari) (Channichthyidae) around South Georgia at various stages of its life cycle
/ 19 86 L en gt h ra ng e (m m ) 60 –1 30 80 –1 30 60 –1 40 70 –1 20 M od al le ng th ... (i.e. by 3 years old) most C. gunnari migrate northwards, where they remain for most of the year ... from time to time an entire year class may be absent from catches taken over several years (Frolkina ... May–June. The time of spawning relates to the temperature regime of the year, i.e. in warmer years ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 49–69 : Autor(es): Frolkina, Zh.A
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Discrimination of Macrourus whitsoni and M. caml (Gadiformes, Macrouridae) using otolith morphometrics
80 60 40 20 0 10 20 30 40 50 60 70 Age (years ... and can live to at least 27 years, M. caml takes more than 30 years Table 4: Discriminant analysis ... – male M. whitsoni – female M. caml – male M. caml – female 60 50 40 30 20 10 0 N um be r o ... 80 60 40 20 30 40 50 60 70 80 90 TL (cm ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 15–28 : Autor(es): Pinkerton, M.H., C. Ó Maolagáin, J. Forman and P. Marriott