. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. GO° D ,? 2*40 D CO 'Vl3 A3 D ^h (^ °*^XD?.^^a^^° % P'AO A Sb "^v- ^<^i D. Fig. II. Distribution oi Raja magellanica. First survey: triangles; second survey: squares; third survey: circles; negative observations left blank. With greater relative frequency in the southern region. Thus of the totals of the two species, less than 30% of the Psammobatis were from the southern region, but 48% of the Raja magellanica were taken there. Although the observed sex ratio of this species was practica
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. GO° D ,? 2*40 D CO 'Vl3 A3 D ^h (^ °*^XD?.^^a^^° % P'AO A Sb "^v- ^<^i D. Fig. II. Distribution oi Raja magellanica. First survey: triangles; second survey: squares; third survey: circles; negative observations left blank. With greater relative frequency in the southern region. Thus of the totals of the two species, less than 30% of the Psammobatis were from the southern region, but 48% of the Raja magellanica were taken there. Although the observed sex ratio of this species was practically 'normal', there was a hint of segregation mto a unisexual shoal at one station. This is a marked feature in some of the more abun- dant elasmobranchs of British seas and may then lead to a most anomalous apparent sex ratio especially in commercial landings, which may be further distorted by greater value and ease of capture. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Institute of Oceanographic Sciences (Great Britain); National Institute of Oceanography of Great Britain; Great Britain. Colonial Office. Discovery Committee. London ; New York : Cambridge University Press
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