[SYSTEM]
You are answering a single information-extraction question. Use ONLY the supplied source material. Do not use prior knowledge. Give a clear, concrete answer with the specific number, name, year, or value asked for.

[USER]
--- SOURCE ARTIFACT (M3-L4 — corrected card) ---
# Table 085 — No caption detected.

PDF page: 355

```csv
Year,Weight of fish landed (tons),Edible phosphorus in fish landed (tons),Phosphorus available for growth in Channel (tons),Usable phosphorus landed as percentage of phosphorus available for growth (Ch)
1925,"81,000",115,"I1I1I,000",O-104
1926,"79,000",103,"137,000",0-075
1927,"74,000",96,"100,000",0-096
1928,"71,000",92,"126,000",0:073
1929,"95,000",123,"126,000",0-098
1930 1931,"58,000 76,000",75 99,"== 5,000",== -104
1930 1931,"58,000 76,000",75 99,"== 95,000",== 0-104
1932,"88,000",II4,"86,000",0°133
1933,"95,000",123,"97,000",O'127
1934,"93,000",121,"88,000",0'137
1935,"65,000",85,"77,000",O-IIO
1936,"79,000",103,"86,000",0-120
1937,"76,000",99,"88,000",O-1I2
```

--- END ARTIFACT ---

Question:
Looking at the annual fish-catch table in Vol 27, how much less fish weight was caught in 1934 than the year before? Show both source values and the difference.

Answer concisely. Cite the row/cell/section you used.