2.1 Sampling Techniques
Zooplankton samples were collected in the late
austral summer of 1991 (from February 20 to
March 4) by the RIV Cariboo. Nineteen stations
were sampled from 30 to 1120 m depth along the
main latitudinal axis ofthe Straits (52°-54°5 latitude; 69-73°W longitude); Fig. 2.1. Details of
station and sample data are given in Table 2.1 of
the first volume of this Atlas, whereas station and
sample data for each taxonomie group are given
in Tab les 2.1 and 2.2 of this volume.
Samples were taken with an EZNET BIONESS
(Easy Zooplankton Net - Bedford Institute of
Oceanography Net and Environmental Sensing
Sytem) equipped with ten opening/closing nets
with a mouth opening of 0.25 m 2 . The EZNET
BIONESS was fitted with three types of plankton
nets; one 1000-l..lm net followed by five 500-l..lm
and four 230-l..lm nets alternatively arranged on
the main frame. The data from both nets are reported in the present study.
The EZNET BIONESS continuously recorded
temperature, salinity and light attenuance with a
KMS II (ME Meerestichnik Elektronic GmbH)
multiparametric probe. Oxygen concentration
was determined with a calibrated oxygen electrode mounted on the KMS II. Flow velocity
through the nets was monitored with external
and interna! acoustic doppler flowmeters (SM
21H-ME Meerestichnik Elektonic GmbH). Chlorophyll a concentration was measured with a
Mie- Backscat Fluorometer (Haardt Optik Mikroelektronik) mounted on the EZNET BIONESS.
Details of the flow speed and sample depths are
given in Chapter 2 of the first volume.
Chapter 2 Materials and Methods
2.2 Identification Cards
The presentation of the species is organized in
five chapters, one for each taxonomie group.
Each chapter gives a systematic account of the
group and a brief synonymy of the species.
When possible, female and male specimens are
described, reporting only morphological characters useful for a rapid and precise species identification. Line drawings are presented of those
anatomical parts which are essential to correctly
identify the species. SEM micrographs are intended as companion illustrations to line drawings, revealing many anatomical details not always evident in the light microscope.
The data on species spatial distributions are
expressed as numbers 100- 3 . All data are plotted
in distribution maps with no consideration for
the depths at which different samples were collected. The vertical distribution of each species,
given below the distribution maps, was obtained
by grouping data for three geographic areas referred to in the text as:
Pacific Area, from the Pacific entrance to Carlos III Island ( Sts. 5, 6, 7, 9, 10, 11 );
Central Area, from Carlos III Island to Pelicano Point (Sts. 12, 13, 14, 15, 16, 17, 18, 19);
Atlantic Area, from Pelicano Point to the Atlantic entrance (Sts. 20, 21, 22, 23, 26).
Temperature (T) and fluorescence (F) profiles
are shown for a key station within each area: St.
9 for the Pacific area, St. 15 for the Central area
and St. 20 for the Atlantic area. The conventional
unit (F) is used for in vivo fluorescence in the
range 0-10 V, corresponding to 0-50 mg/m 3 chl
a, with a resolution of 0.1 mg/m 3 and an accuracy variability ofless than 10 %.
Zooplankton samples were collected in the late
austral summer of 1991 (from February 20 to
March 4) by the RIV Cariboo. Nineteen stations
were sampled from 30 to 1120 m depth along the
main latitudinal axis ofthe Straits (52°-54°5 latitude; 69-73°W longitude); Fig. 2.1. Details of
station and sample data are given in Table 2.1 of
the first volume of this Atlas, whereas station and
sample data for each taxonomie group are given
in Tab les 2.1 and 2.2 of this volume.
Samples were taken with an EZNET BIONESS
(Easy Zooplankton Net - Bedford Institute of
Oceanography Net and Environmental Sensing
Sytem) equipped with ten opening/closing nets
with a mouth opening of 0.25 m 2 . The EZNET
BIONESS was fitted with three types of plankton
nets; one 1000-l..lm net followed by five 500-l..lm
and four 230-l..lm nets alternatively arranged on
the main frame. The data from both nets are reported in the present study.
The EZNET BIONESS continuously recorded
temperature, salinity and light attenuance with a
KMS II (ME Meerestichnik Elektronic GmbH)
multiparametric probe. Oxygen concentration
was determined with a calibrated oxygen electrode mounted on the KMS II. Flow velocity
through the nets was monitored with external
and interna! acoustic doppler flowmeters (SM
21H-ME Meerestichnik Elektonic GmbH). Chlorophyll a concentration was measured with a
Mie- Backscat Fluorometer (Haardt Optik Mikroelektronik) mounted on the EZNET BIONESS.
Details of the flow speed and sample depths are
given in Chapter 2 of the first volume.
Chapter 2 Materials and Methods
2.2 Identification Cards
The presentation of the species is organized in
five chapters, one for each taxonomie group.
Each chapter gives a systematic account of the
group and a brief synonymy of the species.
When possible, female and male specimens are
described, reporting only morphological characters useful for a rapid and precise species identification. Line drawings are presented of those
anatomical parts which are essential to correctly
identify the species. SEM micrographs are intended as companion illustrations to line drawings, revealing many anatomical details not always evident in the light microscope.
The data on species spatial distributions are
expressed as numbers 100- 3 . All data are plotted
in distribution maps with no consideration for
the depths at which different samples were collected. The vertical distribution of each species,
given below the distribution maps, was obtained
by grouping data for three geographic areas referred to in the text as:
Pacific Area, from the Pacific entrance to Carlos III Island ( Sts. 5, 6, 7, 9, 10, 11 );
Central Area, from Carlos III Island to Pelicano Point (Sts. 12, 13, 14, 15, 16, 17, 18, 19);
Atlantic Area, from Pelicano Point to the Atlantic entrance (Sts. 20, 21, 22, 23, 26).
Temperature (T) and fluorescence (F) profiles
are shown for a key station within each area: St.
9 for the Pacific area, St. 15 for the Central area
and St. 20 for the Atlantic area. The conventional
unit (F) is used for in vivo fluorescence in the
range 0-10 V, corresponding to 0-50 mg/m 3 chl
a, with a resolution of 0.1 mg/m 3 and an accuracy variability ofless than 10 %.