Conservation Fisheries Monitoring

One drawback to working with rare, sensitive fish species is that traditional collection and survey methods such as seining or electrofishing often result in some fish mortality. We use low-impact survey methods, such as direct observation with mask and snorkel, to minimize the effects of necessary population monitoring.

Visual observation works particularly well with species such as Barrens topminnow (Fundulus julisia). It is easily identifiable and relatively simple to observe without ever entering the water. Here, Co-Director Pat Rakes stands on a fence post to gain a better viewing angle.

Direct observation with mask and snorkel works best for more secretive species, such as madtoms. Shown at right, a student assistant searches in Citico Creek.

In water too shallow to snorkel, observation via a glass-bottom viewer is carried out while wading.

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